# BabbagePapers

• BAB/F/220 Multiplication.
• BAB/F/220/1 Multiplication. Sheet 1 of 3.
• BAB/F/220/2 Multiplication. Sheet 2 of 3.
• BAB/F/220/3 Multiplication. Sheet 3 of 3.
• BAB/F/221 Verticals for division as performed on Notation 218 arranged on one barrel.
• BAB/F/222 Verticals for multiplication as performed in Notation 220 arranged on one barrel.
• BAB/F/223 Reversing sign.
• BAB/F/224 Stepping ruled by operation cards.
• BAB/F/225 Multiplication of two factors, when the multiplicand has more than k, but both factors together not more than 2 k digits.
• BAB/F/226 Cards, et cetera for multiplication of a number having k + p digits by another number having not more than k - p digits.
• BAB/F/227 Reversing sign ascertaining if a variable is zero, ascertaining if a variable has a + or - sign (supersedes 223).
• BAB/F/228 Counting the digits in any variable P or in any number of variables P Q R et cetera.
• BAB/F/229 Stepping up.
• BAB/F/230 Stepping down.
• BAB/F/231 Multiplication with three multiples.
• BAB/F/231/1 Multiplication with three multiples. Sheet 1 of 2.
• BAB/F/231/2 Multiplication with three multiples. Sheet 2 of 2.
• BAB/F/232 Notation of self-acting positive and negative consecutive carriage.
• BAB/F/233 Notation of units of consecutive half zero carriage.
• BAB/F/234 Notation of tens chains for the anticipating half and whole zero carriage.
• BAB/F/235 Notation of consecutive and half zero carriage.
• BAB/F/236 Anticipating half zero carriage. Addition and subtraction.
• BAB/F/236/1 Anticipating half zero carriage. Addition and subtraction by whole zero. Sheet 1 of 2.
• BAB/F/236/2 Anticipating half zero carriage. Addition and subtraction by half zero. Sheet 2 of 2.
• BAB/F/237 Anticipating whole and half zero digit counting carriage (Drawing 106). Addition and subtraction by whole and half zero.
• BAB/F/238 Digit counting by carriage. Drawing 106.
• BAB/F/239 Trial of a method of division.
• BAB/F/240 Summary of multiplication.
• BAB/F/241 Division.
• BAB/F/242 Division. Working notation belonging to Summary No. 244 which superseded Notation 241.
• BAB/F/243 Working notation belonging to the summary of multiplication number 240.
• BAB/F/244 Summary of division.
• BAB/F/245 Summary of algebraic addition.
• BAB/F/247 Carriage.
• BAB/F/248 Stepping sketches.
• BAB/F/249 Vertical positions of the wheels.
• BAB/F/249/1 Vertical positions of the wheels in addition, subtraction, making table and multiplication. Sheet 1 of 5.
• BAB/F/249/2 Vertical position of the wheels for steppings in division and multiplication. Stepping up during division and giving off to selectors. This includes stepping up before division. Sheet 2 of 5.
• BAB/F/249/3 Vertical positions of the wheels in the final steppings in multiplication and preliminary steppings in division. Sheet 3 of 5.
• BAB/F/249/4 Vertical positions of the wheels. Sheet 4 of 5.
• BAB/F/249/5 Vertical positions of the wheels. Sheet 5 of 5.
• BAB/F/250 Cycles for division, stepping, addition and subtraction.
• BAB/F/251 Cycle of units.
• BAB/F/251/1 Cycle of units. Sheet 1 of 3.
• BAB/F/251/2 Cycle of units. Sheet 2 of 3.
• BAB/F/251/3 Cycle of units. Sheet 3 of 3.
• BAB/F/252 Vertical motions of the wheels and axes of Plan 28.
• BAB/F/253 Multiplication. Sketch from which Notations 259 and 268 were made.
• BAB/F/254 Sketch of division.
• BAB/F/255 Division. Periods of counting apparatus.
• BAB/F/256 Multiplication. Periods of counting apparatus.
• BAB/F/257 Mill decimal counting apparatus.
• BAB/F/258 Counting apparatus. Multiplication and division.
• BAB/F/259 Approximative multiplication.
• BAB/F/259/1 Approximative multiplication. Sheet 1 of 5.
• BAB/F/259/2 Approximative multiplication. Summary of multiplication. Sheet 2 of 5.
• BAB/F/259/3 Approximative multiplication. Sheet 3 of 5.
• BAB/F/259/4 Approximative multiplication. Sheet 4 of 5.
• BAB/F/259/5 Approximative multiplication. Sheet 5 of 5.
• BAB/F/260 No sheet exists.
• BAB/F/261 Plan 28. Trains, vertical positions of the wheels and algebraic addition.
• BAB/F/261/1 Vertical positions of the wheels of Plan 28. Sheet 1 of 23.
• BAB/F/261/2 Vertical positions of the wheels of Plan 28. Sheet 2 of 23.
• BAB/F/261/3 Vertical positions of the wheels of Plan 28. Sheet 3 of 23.
• BAB/F/261/4 Vertical positions of the wheels of Plan 28. Sheet 4 of 23.
• BAB/F/261/5 Vertical positions of the wheels of Plan 28. Sheet 5 of 23.
• BAB/F/261/6 Vertical positions of the wheels of Plan 28. Sheet 6 of 23.
• BAB/F/261/7 Vertical positions of the wheels of Plan 28. Sheet 7 of 23.
• BAB/F/261/8 Vertical positions of the wheels of Plan 28. Sheet 8 of 23.
• BAB/F/261/9 Vertical positions of the wheels of Plan 28. Sheet 9 of 23.
• BAB/F/261/10 Vertical positions of the wheels of Plan 28. Sheet 3 of 23.
• BAB/F/261/11 Vertical positions of the wheels of Plan 28. Sheet 11 of 23.
• BAB/F/261/12 Vertical positions of the wheels of Plan 28. Sheet 12 of 23.
• BAB/F/261/13 Vertical positions of the wheels of Plan 28. Sheet 13 of 23.
• BAB/F/261/14 Vertical positions of the wheels of Plan 28 for multiplication. Sheet 14 of 23.
• BAB/F/261/15 Vertical positions of the wheels of Plan 28. Sheet 15 of 23.
• BAB/F/261/16 Vertical positions of the wheels of Plan 28 for algebraic addition of i k figures. Cycle ordered by vertical C of centre barrel. Sheet 16 of 23.
• BAB/F/261/17 Vertical positions of the wheels of Plan 28 for artificial stepping of divisor. Sheet 17 of 23.
• BAB/F/261/18 Vertical positions of the wheels of Plan 28 for algebraic addition of k figures. Sheet 18 of 23.
• BAB/F/261/19 Vertical positions of the wheels of Plan 28 algebraic addition of k figures. Sheet 19 of 23.
• BAB/F/261/20 Vertical positions of the wheels of Plan 28 for algebraic addition of i k figures. First part of cycles ordered by verticals n and 'n of centre barrel. Sheet 20 of 23.
• BAB/F/261/21 Algebraic addition of i k figures. Cycle ordered by vertical "a of centre barrel. Sheet 21 of 23.
• BAB/F/261/22 Algebraic addition of i k figures (General Plan 28). Latter part of cycles ordered by vertical 'n of centre barrel. Sheet 22 of 23.
• BAB/F/261/23 Algebraic addition of i k figures (General Plan 28). Cycle ordered by vertical ""s of centre barrel. Sheet 23 of 23.
• BAB/F/262 Multiplication.
• BAB/F/262/1 Multiplication. Genealogy of variation of multiplication. Sheet 1 of 2.
• BAB/F/262/2 Multiplication. Sheet 2 of 2.
• BAB/F/263 Multiplication.
• BAB/F/264 Multiplication.
• BAB/F/265 Multiplication.
• BAB/F/266 Verticals for multiplication. Notation 259.
• BAB/F/267 Counting apparatus. Approximative multiplication and division.
• BAB/F/268 Approximative and common multiplication for Plans 28 and 28a.
• BAB/F/268/1 Approximative multiplication for Plans 28 and 28a. Sheet 1 of 8.
• BAB/F/268/2 Approximative multiplication for Plan 28. Sheet 2 of 8.
• BAB/F/268/3 Approximative multiplication for Plan 28. Sheet 3 of 8.
• BAB/F/268/4 Approximative multiplication for Plan 28. Sheet 4 of 8.
• BAB/F/268/5 Approximative multiplication for Plan 28. Sheet 5 of 8.
• BAB/F/268/6 Approximative multiplication for Plan 28. Sheet 6 of 8.
• BAB/F/268/7 Approximative multiplication for Plan 28. Sheet 7 of 8.
• BAB/F/268/8 Common multiplication for Plan 28. Sheet 8 of 8.
• BAB/F/269 First arrangement of the verticals for one barrel to do approximative multiplication.
• BAB/F/269/1 First arrangement of the verticals for one barrel to do approximative multiplication. Notation 268. Sheet 1 of 2.
• BAB/F/269/2 First arrangement of the verticals for common multiplication. Notation 268. Sheet 2 of 2.
• BAB/F/270 Sketch of division.
• BAB/F/271 Cases of division to illustrate the method of selecting with the half zero apparatus.
• BAB/F/271/1 Cases of division to illustrate the method of selecting with the half zero apparatus. Sheet 1 of 2.
• BAB/F/271/2 Cases of division to illustrate the method of selecting with the half zero apparatus of Plan 28. Sheet 2 of 2.
• BAB/F/272 Division. Rough drafts of parts of Notations 272 and 273.
• BAB/F/273 Directive for division. Four barrels.
• BAB/F/274 Directive for multiplication. Four barrels.
• BAB/F/275 Vertical movements of axes ordered by left and right barrels for multiplication.
• BAB/F/275/1 Vertical movements of axes ordered by right barrel for multiplication compiled in part from a genealogical notation. Sheet 1 of 3.
• BAB/F/275/2 Vertical movements of axes ordered by right barrel for multiplication compiled in part from a genealogical notation. Sheet 2 of 3.
• BAB/F/275/3 Vertical movements of axes ordered by left barrel for multiplication compiled in part from a genealogical notation. Sheet 3 of 3.
• BAB/F/276 Vertical movements of axes ordered by barrels for division.
• BAB/F/276/1 Vertical movements of axes ordered by right barrel for division. Compiled from a genealogical notation. Sheet 1 of 3.
• BAB/F/276/2 Vertical movements of axes ordered by middle barrel for division. Sheet 2 of 3.
• BAB/F/276/3 Vertical movements of axes ordered by left barrel for division. Sheet 3 of 3.
• BAB/F/277 Algebraic addition of k figures.
• BAB/F/278 Algebraic addition and algebraic subtraction.
• BAB/F/279 Algebraic addition of i k figures.
• BAB/F/280 General directive.
• BAB/F/281 General directive.
• BAB/F/283 Description of parts and their duties. Plan 28.
• BAB/F/284 Cards and barrels.
• BAB/F/286 Algebraic addition of k figures.
• BAB/F/287 Algebraic addition of k figures. Algebraic subtraction of k figures.
• BAB/F/288 Verticals on barrel of mill counting apparatus.
• BAB/F/289 Verticals for barrels for multiplication.
• BAB/F/289/1 Verticals for counting barrel for multiplication. Notation 268. Sheet 1 of 4.
• BAB/F/289/2 Verticals for right and table barrel for multiplication. Notation 268. Sheet 2 of 4.
• BAB/F/289/3 Verticals for left and middle barrels for multiplication. Notation 268. Sheet 3 of 4.
• BAB/F/289/4 Verticals for two barrels for counting apparatus for multiplication. Notation 268. Sheet 4 of 4.
• BAB/F/290 Division as performed with General Plans 28 and 28a and mill counting apparatus.
• BAB/F/290/1 Division as performed with General Plans 28 and 28a and mill counting apparatus. Sheet 1 of 15.
• BAB/F/290/2 Division. Sheet 2 of 15.
• BAB/F/290/3 Division. Sheet 3 of 15.
• BAB/F/290/4 Division. Sheet 4 of 15.
• BAB/F/290/5 Division. Sheet 5 of 15.
• BAB/F/290/6 Division. Sheet 6 of 15.
• BAB/F/290/7 Division. Sheet 7 of 15.
• BAB/F/290/8 Division. Sheet 8 of 15.
• BAB/F/290/9 Division. Sheet 9 of 15.
• BAB/F/290/10 Division. Sheet 10 of 15.
• BAB/F/290/11 Division. Sheet 11 of 15.
• BAB/F/290/12 Division. Sheet 12 of 15.
• BAB/F/290/13 Division. Sheet 13 of 15.
• BAB/F/290/14 Division. Sheet 14 of 15.
• BAB/F/290/15 Division. Sheet 15 of 15.
• BAB/F/291 Verticals of the counting apparatus, table, right, middle and left barrels.
• BAB/F/291/1 Verticals of the counting apparatus barrel for division as performed with Plan 28, Notation 290 and mill counting apparatus sketched on Drawings 125 and 126. Sheet 1 of 9.
• BAB/F/291/2 Verticals of the counting apparatus barrel. Sheet 2 of 9.
• BAB/F/291/3 Verticals of the counting apparatus barrel. Sheet 3 of 9.
• BAB/F/291/4 Verticals of table barrel. Sheet 4 of 9.
• BAB/F/291/5 Verticals of right barrel. Sheet 5 of 9.
• BAB/F/291/6 Verticals of middle barrel. Sheet 6 of 9.
• BAB/F/291/7 Verticals of left barrel. Sheet 7 of 9.
• BAB/F/291/8 Verticals of the counting apparatus barrel number 1. Sheet 8 of 9.
• BAB/F/291/9 Verticals of the counting apparatus barrel number 2. Sheet 9 of 9.
• BAB/F/292 Algebraic addition of k figures for algebraic card +.
• BAB/F/295 Algebraic addition of i k figures.
• BAB/F/296 Algebraic give off and retain for k figures.
• BAB/F/298/1 Algebraic addition. Sheet 1 of 2.
• BAB/F/298/2 Algebraic addition. Sheet 2 of 2.
• BAB/F/299 Algebraic addition, give off and retain for General Plan 28.
• BAB/F/299/1 Algebraic addition give off and retain for General Plan 28. Sheet 1 of 2.
• BAB/F/299/2 Algebraic addition, give off and retain. Sheet 2 of 2.
• BAB/F/300 Algebraic addition of i k figures. Multiplication.
• BAB/F/301 Algebraic addition of i k figures for General Plan 28.
• BAB/F/301/1 Algebraic addition of i k figures for General Plan 28 (Summary). Sheet 1 of 2.
• BAB/F/301/2 Algebraic addition of i k figures for General Plan 28 (Summary). Sheet 2 of 2.
• BAB/F/302 Algebraic addition with giving off (summary).
• BAB/F/303 Algebraic addition of k figures.
• BAB/F/304 Algebraic addition with giving off and retain.
• BAB/F/304/1 Algebraic addition with giving off. Sheet 1 of 2.
• BAB/F/304/2 Algebraic addition with giving off and retain. Sheet 2 of 2.
• BAB/F/305 Algebraic addition of k figures with give off and without retaining for General Plan 28.
• BAB/F/306 Algebraic addition of k figures.
• BAB/F/306/1 Algebraic addition of k figures adapted to General Plan 28. Sheet 1 of 4.
• BAB/F/306/2 Algebraic addition of k figures. Sheet 2 of 4.
• BAB/F/306/3 Algebraic addition of k figures. Sheet 3 of 4.
• BAB/F/306/4 Algebraic addition of k figures. Sheet 4 of 4.
• BAB/F/307 Verticals for algebraic addition of k figures.
• BAB/F/307/1 Verticals for algebraic addition of k figures. Sheet 1 of 2.
• BAB/F/307/2 Verticals for algebraic addition of k figures. Sheet 2 of 2.
• BAB/F/308 Verticals for algebraic addition of k figures.
• BAB/F/308/1 Verticals for one barrel to do algebraic addition of k figures. Sheet 1 of 2.
• BAB/F/308/2 Verticals for algebraic addition of k figures. One barrel. Sheet 2 of 2.
• BAB/F/309 Analytical Engine. Algebraic addition of k figures. One barrel.
• BAB/F/310 Analytical Engine. Algebraic addition of k figures.
• BAB/F/311 Algebraic addition of k figures.
• BAB/F/312 Algebraic addition of k figures. Three barrels.
• BAB/F/313 Verticals for one barrel to perform algebraic addition of k figures with General Plan 28.
• BAB/F/313/1 Verticals for one barrel to perform algebraic addition of k figures with General Plan 28. Sheet 1 of 2.
• BAB/F/313/2 Verticals for one barrel to perform algebraic addition of k figures with General Plan 28. Sheet 2 of 2.
• BAB/F/314 Multiplication. One barrel.
• BAB/F/314/1 Multiplication. One barrel. Sheet 1 of 2.
• BAB/F/314/2 Multiplication. One barrel. Sheet 2 of 2.
• BAB/F/315 Multiplication. One barrel.
• BAB/F/315/1 Multiplication. One barrel. Sheet 1 of 2.
• BAB/F/315/2 Multiplication. One barrel. Sheet 2 of 2.
• BAB/F/316 List of verticals on one barrel for division (Notation 290) with the equivalent verticals on five barrels to order the same work.
• BAB/F/317 Genealogy of multiplication.
• BAB/F/317/1 Genealogy of multiplication. Sheet 1 of 2.
• BAB/F/317/2 Genealogy of multiplication. One barrel. Sheet 2 of 2.
• BAB/F/318 Verticals for one barrel of 278 verticals to perform division with General Plan 28.
• BAB/F/318/1 Verticals for one barrel of 278 verticals to perform division with General Plan 28. Sheet 1 of 3.
• BAB/F/318/2 Verticals for one barrel of 278 verticals to perform division with General Plan 28. Sheet 2 of 3.
• BAB/F/318/3 Verticals for one barrel of 278 verticals to perform division with General Plan 28. Sheet 3 of 3.
• BAB/F/319 List of verticals on one barrel for multiplication (Notation 268) with the equivalent verticals on five barrels to order the same work.
• BAB/F/320 Second arrangement of the verticals for one barrel to perform multiplication in the manner exhibited on Notation 268 and with General Plan 28 and 28a.
• BAB/F/321 Algebraic addition of i k figures.
• BAB/F/321/1 Algebraic addition of i k figures by the method described in Sketch Book Vol IV p 95 and with General Plan 28. Sheet 1 of 8.
• BAB/F/321/2 Algebraic addition of i k figures. Sheet 2of 8.
• BAB/F/321/3 Algebraic addition of i k figures. Sheet 3 of 8.
• BAB/F/321/4 Algebraic addition of i k figures. Sheet 4 of 8.
• BAB/F/321/5 Algebraic addition of i k figures. Sheet 5 of 8.
• BAB/F/321/6 Algebraic addition of i k figures. Sheet 6 of 8.
• BAB/F/321/7 Algebraic addition of i k figures. Sheet 7 of 8.
• BAB/F/321/8 Algebraic addition of i k figures. Sheet 8 of 8.
• BAB/F/322 Verticals for algebraic addition of i k figures. Notation 321.
• BAB/F/322/1 Verticals of algebraic addition of i k figures. Notation 321. Sheet 1 of 3.
• BAB/F/322/2 Verticals of algebraic addition of i k figures. Notation 321. Sheet 2 of 3.
• BAB/F/322/3 Verticals of algebraic addition of i k figures. Notation 321. Sheet 3 of 3.
• BAB/F/323 Verticals upon four barrels for algebraic addition of i k figures. Notation 321.
• BAB/F/323/1 Verticals upon four barrels for algebraic addition of i k figures. Notation 321. Sheet 1 of 2.
• BAB/F/323/2 Verticals upon four barrels for algebraic addition of i k figures. Notation 321. Sheet 2 of 2.
• BAB/F/324 Notation of cycle wheels.
• BAB/F/325 Notation of units for Plan 28.
• BAB/F/326 Untitled. [Motions of axes and wheels of Plan 28]
• BAB/F/327 Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for multiplication as performed in working Notation 268.
• BAB/F/327/1 Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for multiplication as performed in working Notation 268. Sheet 1 of 4.
• BAB/F/327/2 Untitled. [Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for multiplication as performed in working Notation 268]. Sheet 2 of 4.
• BAB/F/327/3 Untitled. [Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for multiplication as performed in working Notation 268]. Sheet 3 of 4.
• BAB/F/327/4 Untitled. [Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for multiplication as performed in working Notation 268]. Sheet 4 of 4.
• BAB/F/328 Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for algebraic addition of k figures as performed in Notations 306 and 306x.
• BAB/F/329 Vertical position of the axes, wheels, et cetera, of right group of Plan 28 while performing multiplication as in Notation 268.
• BAB/F/330 Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for algebraic addition of i k figures as performed in Notation 321.
• BAB/F/330/1 Vertical motions of the wheels and axes of the right, middle and left groups of Plan 28 for algebraic addition of i k figures as performed in Notation 321. Sheet 1 of 2.
• BAB/F/330/2 Vertical motions for algebraic addition of i k figures. Sheet 2 of 2.
• BAB/F/331 Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for division as performed in working Notation 290.
• BAB/F/331/1 Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for division as performed in working Notation 290. Sheet 1 of 4.
• BAB/F/331/2 Untitled. [Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for division as performed in working Notation 290]. Sheet 2 of 4.
• BAB/F/331/3 Untitled. [Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for division as performed in working Notation 290]. Sheet 3 of 4.
• BAB/F/331/4 Untitled. [Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for division as performed in working Notation 290]. Sheet 4of 4.
• BAB/F/332 Ascertaining if a variable = 0. Ascertaining if a variable has a + or - sign as performed by General Plans 28 and 28a.
• BAB/F/333 Finding the sum of the numbers of digits in two numbers P and Q and finding the difference of the numbers of digits in two numbers P and Q. Plans 28 and 28a.
• BAB/F/334 Differences as performed by General Plans 28 and 28a.
• BAB/F/334/1 Differences as performed by General Plans 28 and 28. Sheet 1 of 2.
• BAB/F/334/2 Differences as performed by General Plans 28 and 28a. Sheet 2 of 2.
• BAB/F/335 Stepping up or down or multiplying or dividing by any power of ten. Plans 28 and 28a.
• BAB/F/335/1 Stepping up or down or multiplying or dividing by any power of ten. Plans 28 and 28a. Sheet 1 of 2.
• BAB/F/335/2 Stepping up or down or multiplying or dividing by any power of ten. Plans 28 and 28a. Sheet 2 of 2.
• BAB/F/336 Notation of verticals for working Notations 332 and 333.
• BAB/F/337 Notation of verticals for differences (Notation 334) and stepping up or down Notation 335.
• BAB/F/338 Notation of units for General Plan 28. Superseded by 353.
• BAB/F/339 List of cycles with their vertical motions.
• BAB/F/340 Vertical motions of cycles a and a e.
• BAB/F/341 Vertical motions of the wheels and axes of the centre group.
• BAB/F/341/1 Vertical motions of the wheels and axes of the centre group. Sheet 1 of 4.
• BAB/F/341/2 Vertical motions of the wheels and axes of the centre group. Plans 28 and 28a. Sheet 2 of 4.
• BAB/F/341/3 Vertical motions of the wheels and axes of the centre group. Sheet 3 of 4.
• BAB/F/341/4 Vertical motions of the wheels and axes of the centre group. Sheet 4 of 4.
• BAB/F/342 Motions of some of the axes.
• BAB/F/343 Motions of some of the axes for Plan 28.
• BAB/F/343/1 Motions of some of the axes for Plan 28. Sheet 1 of 8.
• BAB/F/343/2 Motions of some of the axes for Plan 28. Sheet 2 of 8.
• BAB/F/343/3 Motions of some of the axes for Plan 28. Sheet 3 of 8.
• BAB/F/343/4 Motions of some of the axes for Plan 28. Sheet 4 of 8.
• BAB/F/343/5 Motions of some of the axes for Plan 28. Sheet 5 of 8.
• BAB/F/343/6 [Motions of some of the axes for Plan 28]. Sheet 6 of 8.
• BAB/F/343/7 [Motions of some of the axes for Plan 28]. Sheet 7 of 8.
• BAB/F/343/8 [Motions of some of the axes for Plan 28]. Sheet 8 of 8.
• BAB/F/344 Lockings (circular) of Plan 28.
• BAB/F/344/1 Lockings (circular) of Plan 28. Sheet 1 of 2.
• BAB/F/344/2 [Lockings (circular) of Plan 28]. Sheet 2 of 2.
• BAB/F/345 Vertical motions of the wheels and axes of the middle group of Plan 28a for algebraic addition of k figures as performed in Notations 306 and 306x.
• BAB/F/346 Vertical motions of the wheels and axes of the middle group of Plan 28 for algebraic addition of i k figures as performed in Notation 321.
• BAB/F/346/1 Vertical motions of the wheels and axes of the middle group of Plan 28 for algebraic addition of i k figures as performed in Notation 321. Sheet 1 of 2.
• BAB/F/346/2 Vertical motions for algebraic addition of i k figures. Sheet 2 of 2.
• BAB/F/347 List of the vertical movements in the left middle and right groups.
• BAB/F/347/1 List of the vertical movements in the left middle and right groups. Sheet 1 of 2.
• BAB/F/347/2 List of the vertical movements in the left middle and right groups distributed by heights and cycles. Sheet 2 of 2.
• BAB/F/348 Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for multiplication as performed in working Notation 268
• BAB/F/348/1 Trains and vertical motions of the wheels and axes of the right, middle and left groups of Plan 28a for multiplication as performed in working Notation 268. Sheet 1 of 3.
• BAB/F/348/2 Trains and vertical motions for multiplication. Sheet 2 of 3.
• BAB/F/348/3 Trains and vertical motions for multiplication. Sheet 3 of 3.
• BAB/F/349 Analysis of verticals on left group for multiplication.
• BAB/F/350 Lockings of Plan 28a.
• BAB/F/351 Notation of units for cycles of c (=18) and of 2c units used for counting the digits in multiplication and division.
• BAB/F/352 Vertical positions of some of the wheels of Plan 28a. Notation 348 cycles.
• BAB/F/352/1 Vertical positions of some of the wheels of Plan 28a. Notation 348 cycles. Sheet 1 of 13.
• BAB/F/352/2 Notation 348 cycle 18. Sheet 2 of 13.
• BAB/F/352/3 Notation 348 cycle 19. Sheet 3 of 13.
• BAB/F/352/4 Notation 348 cycle 20. Sheet 4 of 13.
• BAB/F/352/5 Notation 348 cycles 26 and 27. Sheet 5 of 13.
• BAB/F/352/6 Notation 348 cycle 26. Sheet 6 of 13.
• BAB/F/352/7 Notation 348 cycles 26 and 27. Sheet 7 of 13.
• BAB/F/352/8 Notation 348 cycle 26. Sheet 8 of 13.
• BAB/F/352/9 Notation 331 cycles 21 and 26. Sheet 9 of 13.
• BAB/F/352/10 Notation 331 cycle 23 and 24. Sheet 10 of 13.
• BAB/F/352/11 Untitled. [Vertical positions of some of the wheels of Plan 28a. Notation 348 and 331 cycles]. Sheet 11 of 13.
• BAB/F/352/12 Untitled. [Vertical positions of some of the wheels of Plan 28a. Notation 348 and 331 cycles]. Sheet 12 of 13.
• BAB/F/352/13 Untitled. [Vertical positions of some of the wheels of Plan 28a. Notation 348 and 331 cycles]. Sheet 13 of 13.
• BAB/F/353 Notation of units for General Plan 28a.
• BAB/F/353/1 Notation of units for General Plan 28a. Sheet 1 of 6.
• BAB/F/353/2 Notation of units for General Plan 28a. Sheet 2 of 6.
• BAB/F/353/3 Notation of units for General Plan 28a. Sheet 3 of 6.
• BAB/F/353/4 Notation of units for General Plan 28a. Sheet 4 of 6.
• BAB/F/353/5 Notation of units for General Plan 28a. Sheet 5 of 6.
• BAB/F/353/6 Notation of units for mill counting apparatus drawings 125, 126 and 137 and for sign wheel drawing. Sheet 6 of 6.
• BAB/F/354 Times of lockings in various cycles for Plan 28.
• BAB/F/354/1 Times of lockings in various cycles for Plan 28. Sheet 1 of 2.
• BAB/F/354/2 Untitled. [Times of lockings in various cycles for Plan 28]. Sheet 2 of 2.
• BAB/F/355 Trains and vertical motions of the wheels and axes of the centre group for differences and of the right group for stepping up or down. Plan 28a.
• BAB/F/356 Untitled. [Verticals. Motions of the wheels and axes for Plan 28].
• BAB/F/356/1 Untitled. [Verticals. Motions of the wheels and axes for Plan 28]. Sheet 1 of 2.
• BAB/F/356/2 Untitled. [Verticals. Motions of the wheels and axes for Plan 28]. Sheet 2 of 2.
• BAB/F/357 Duties of the calculating mechanism of left, centre and right groups of Plan 28a.
• BAB/F/357/1 Duties of the calculating mechanism of left, centre and right groups of Plan 28a. Right group. Sheet 1 of 11.
• BAB/F/357/2 Duties of the calculating mechanism of left, centre and right groups of Plan 28a. Right group. Sheet 2 of 11.
• BAB/F/357/3 Duties of the calculating mechanism of Plan 28a. Centre group. Sheet 3 of 11.
• BAB/F/357/4 Duties of the calculating mechanism of Plan 28a. Centre group. Sheet 4 of 11.
• BAB/F/357/5 Duties of the calculating mechanism of Plan 28a. Centre group. Sheet 5 of 11.
• BAB/F/357/6 Duties of the calculating mechanism of left, centre and right groups of Plan 28a. Centre group. Sheet 6 of 11.
• BAB/F/357/7 Duties of the calculating mechanism of Plan 28a. Centre group. Sheet 7 of 11.
• BAB/F/357/8 Duties of the calculating mechanism of Plan 28a. Centre group. Sheet 8 of 11.
• BAB/F/357/9 Duties of the calculating mechanism of Plan 28a. Left group. Sheet 9 of 11.
• BAB/F/357/10 Duties of the calculating mechanism of Plan 28a. Left group. Sheet 10 of 11.
• BAB/F/357/11 Duties of the calculating mechanism of Plan 28a. Left group. Sheet 11 of 11.
• BAB/F/358 Analysis of the trains with reference to cycles and verticals.
• BAB/F/358/1 Analysis of the trains with reference to cycles and verticals. Right group. Sheet 1 of 3.
• BAB/F/358/2 Analysis of the trains with reference to cycles and verticals. Centre group. Sheet 2 of 3.
• BAB/F/358/3 Analysis of the trains with reference to cycles and verticals. Left group. Sheet 3 of 3.
• BAB/F/359 Trains and vertical motions of the wheels and axes of the table group of Plan 28a for multiplication, as performed in working Notation 268 and for stepping up or down.
• BAB/F/360 Trains and vertical motions of the wheels and axes of the table group of Plan 28a for division, as performed in working Notation 290 and for ascertaining if a variable has a + or - sign.
• BAB/F/361 Trains and vertical motions of the wheels and axes ordered by barrel no. 1 of the mill counting apparatus of Plans 28 and 28a for multiplication, as performed in the working Notation 268.
• BAB/F/361/1 Trains and vertical motions of the wheels and axes ordered by barrel no. 1 of the mill counting apparatus of Plans 28 and 28a for multiplication, as performed in the working Notation 268. Sheet 1 of 2.
• BAB/F/361/2 Trains and vertical motions of the wheels and axes ordered by barrel no. 2 of the mill counting apparatus of Plans 28 and 28a for multiplication, as performed in the working Notation 268. Sheet 2 of 2.
• BAB/F/362 Trains and vertical motions of the wheels and axes ordered by barrel no. 1 of the mill counting apparatus of Plans 28 and 28a for division, as performed in working Notation 290.
• BAB/F/362/1 Trains and vertical motions of the wheels and axes ordered by barrel no. 1 of the mill counting apparatus of Plans 28 and 28a for division, as performed in working Notation 290. Sheet 1 of 2.
• BAB/F/362/2 Trains and vertical motions of the wheels and axes ordered by barrel no. 2 of the mill counting apparatus of Plans 28 and 28a for division, as performed in working Notation 290. Sheet 2 of 2.
• BAB/F/363 Trains and vertical motions of the wheels and axes of the table group of Plan 28a for algebraic addition, as performed in working Notations 306 and 321.
• BAB/F/364 Notations of periods ready for copying.
• BAB/F/365 Notation of periods for table axes.
• BAB/F/366 Notation of periods for mill counting apparatus.
• BAB/F/367 Notation of periods for right group.
• BAB/F/367/1 Notation of periods for right group. Sheet 1 of 5.
• BAB/F/367/2 Notation of periods for right group. Sheet 2 of 5.
• BAB/F/367/3 Notation of periods for right group. Sheet 3 of 5.
• BAB/F/367/4 Notation of periods for right group. Sheet 4 of 5.
• BAB/F/367/5 Notation of periods for right group. Sheet 5 of 5.
• BAB/F/368 Notation of periods for the centre group.
• BAB/F/369 Duties of the mill counting apparatus which require the cycle of 2c(=36) units for Plan 28a.
• BAB/F/369/1 Duties of the mill counting apparatus which require the cycle of 2c(=36) units for Plan 28a. Sheet 1 of 2.
• BAB/F/369/2 Duties of the mill counting apparatus which require the cycle of a(=12) units for Plan 28a. Sheet 2 of 2.
• BAB/F/370 Duties of the calculating mechanism of Plan 28a table group.
• BAB/F/370/1 Duties of the calculating mechanism of Plan 28a table group. Sheet 1 of 2.
• BAB/F/370/2 Duties of the calculating mechanism of Plan 28a table group. Sheet 2 of 2.
• BAB/F/371 Analysis of lockings.
• BAB/F/371/1 Analysis of lockings. Right Group. Sheet 1 of 4.
• BAB/F/371/2 Analysis of the lockings. Centre group. Sheet 2 of 4.
• BAB/F/371/3 Analysis. Sheet 3 of 4.
• BAB/F/371/4 Analysis of the lockings on the left group. Sheet 4 of 4.
• BAB/F/372 Vertical motions for multiplication, division, addition and differences.
• BAB/F/372/1 Right group. Vertical motions arranged by cycles. Multiplication and division. Sheet 1 of 5.
• BAB/F/372/2 Untitled. [Vertical motions for multiplication and division]. Sheet 2 of 5.
• BAB/F/372/3 Centre group. Sheet 3 of 5.
• BAB/F/372/4 Mill counting apparatus. Vertical motions of the axes ordered by barrel no. 2. Sheet 4 of 5.
• BAB/F/372/5 Table group. Sheet 5 of 5.
• BAB/F/373 Skeleton of vertical motions for all operations.
• BAB/F/373/1 Skeleton of vertical motions for all operations. Right groups. Multiplication and division from 372 Sheet 1. Sheet 1 of 3.
• BAB/F/373/2 Skeleton of vertical motions for all operations. Left group. Sheet 2 of 3.
• BAB/F/373/3 Skeleton of vertical motions for all operations. Centre group. Sheet 3 of 3.
• BAB/F/374 Abstract of vertical motions arranged by cycles. Centre group.
• BAB/F/375 Combination of the cycles of the groups; right, centre, left, table.
• BAB/F/375/1 Combination of the cycles of the groups; right, centre, left, table, for multiplication. Sheet 1 of 2.
• BAB/F/375/2 Combination of the cycles of the groups, right, centre, left, table. Sheet 2 of 2.
• BAB/F/376 Skeleton of vertical motions of left, centre, right, table groups and mill counting apparatus.
• BAB/F/376/1 Skeleton of vertical motions of left group. Sheet 1 of 6.
• BAB/F/376/2 Skeleton of vertical motions of centre group. Sheet 2 of 6.
• BAB/F/376/3 Untitled. [Skeleton of vertical motions of right group]. Sheet 3 of 6.
• BAB/F/376/4 Untitled. [Skeleton of vertical motions of table group. Sheet 4 of 6.
• BAB/F/376/5 Untitled. [Skeleton of vertical motions of mill counting apparatus barrel no. 1]. Sheet 5 of 6.
• BAB/F/376/6 Untitled.[Skeleton of vertical motions of mill counting apparatus barrel no. 2.] Sheet 6 of 6.
• BAB/F/377 List of the combinations in multiplication performed in Notation 268, with the cycles in which they occur.
• BAB/F/378 List of the combinations in division performed as in Notation 290, with the cycles in which they occur.
• BAB/F/378/1 List of the combinations in division performed as in Notation 290, with the cycles in which they occur. Sheet 1 of 4.
• BAB/F/378/2 List of the combinations in division performed as in Notation 290, with the cycles in which they occur. Sheet 2 of 4.
• BAB/F/378/3 List, et cetera. [List of the combinations in division performed as in Notation 290, with the cycles in which they occur] Sheet 3 of 4.
• BAB/F/378/4 Untitled. [List of the combinations in division performed as in Notation 290, with the cycles in which they occur] Sheet 4 of 4.
• BAB/F/379 List of the combinations in division performed as in Notation 290, with the cycles in which they occur.
• BAB/F/380 List of the cases in multiplication as performed in Notation no. 268.
• BAB/F/381 List of the cases in division as performed in Notation 290.
• BAB/F/382 Notation of units anticipating whole zero cycles by circular chain.
• BAB/F/383 Notation of units for Difference Engine calculating part.
• BAB/F/383/1 Notation of units for Difference Engine calculating part. Sheet 1 of 2.
• BAB/F/383/2 Notation of units for Difference Engine No. 2 calculating part. Sheet 2 of 2.
• BAB/F/384 Notation of units for stereotype printing apparatus.
• BAB/F/385 Notation of units for Difference Engine No. 2.
• BAB/F/385/1 Notation of units for Difference Engine No. 2. Sheet 1 of 2.
• BAB/F/385/2 Notation of units for various methods of giving motion to Difference Engine No. 2. Sheet 2 of 2.
• BAB/F/386 Directive. Difference Engine No. 2. [Genealogy]
• BAB/F/387 Analytical Engine. Notation of units of incommensurable cycle wheel.
• BAB/F/388 Notation of units of apparatus for combining incommensurable cycles (Drawing 142).
• BAB/G Cardboard drawings of the Analytical Engine
• BAB/G/001 General plan of Analytical Engine, quarter size.
• BAB/G/002 Rising platform and selectors for variable columns in store one to each half of store. Quarter size.
• BAB/G/003 Store variable selectors. Superseding drawing No 2.
• BAB/G/004 General plan of the Analytical Engine, half size.
• BAB/G/005 Whole zero anticipating carriage with one plate in each cage.
• BAB/G/006 Half zero anticipating carriage with three plates in each cage.
• BAB/G/007 Plans for the moulds for anticipating carriage.
• BAB/G/008 Mould for wheel of eighty teeth. Adding column.
• BAB/G/009 Mould for warning pinion.
• BAB/G/010 Untitled, appears to represent the printing mechanism.
• BAB/G/011 Print apparatus as made in the large model.
• BAB/G/012 Probably a plan of carriage and figure columns.
• BAB/G/013 Plan of motion for carriage slide.
• BAB/G/014 Details of carriage.
• BAB/G/015 Motion for carrying the tens, plus and minus.
• BAB/H Notation of units of the Difference Engine No. 2.
• BAB/H/001 Sheet 1 showing driving, odd difference sectors, circular motion and vertical motion.
• BAB/H/002 Sheet 2 showing odd difference figure wheels, circular motion, vertical motion; locking of odd difference figure wheels and odd difference warnings, circular motion.
• BAB/H/003 Sheet 3 showing odd difference warnings, vertical motion; even difference sectors, circular motion, vertical motion and even difference figure wheels, circular motion.
• BAB/H/004 Sheet 4 showing even difference figure wheels, vertical motion, locking of even difference figure wheels and even difference warnings, circular motion and vertical motion.
• BAB/H/005 Sheet 5 showing odd difference figure wheels; odd difference warnings; odd difference carriage; even difference sectors and even difference figure wheels.
• BAB/H/006 Sheet 6 showing even difference figure wheels; even difference warnings; large stereotype sectors, vertical motion and calculations conveyed to printing sectors, to large and small stereotype sectors.
• BAB/H/007 Sheet 7 showing locking of large stereotype sectors, printing sectors, figure racks, printing racks and small stereotype sector, vertical motion.
• BAB/H/008 Sheet 8 showing paper rollers, inking rollers, copper plate motion [column to column motion].
• BAB/H/009 Sheet 9 showing copper plate motion.
• BAB/I There is no physical material for this series although the reference was included in the previous finding aid.
• BAB/J Draft notation of the Difference Engine No. 2
• BAB/J/001 Notation of units
• BAB/J/002 Notation of units
• BAB/J/003 Notation of units
• BAB/J/004 Notation of units. Circular motions of the calculating axes. Odd difference warnings and figure wheels.
• BAB/J/005 Notation of units. Vertical motions. Even and odd difference sectors.
• BAB/J/006 Notation of units.
• BAB/J/007 Notation of units. Vertical motions of the calculating axes. Even and odd difference warnings.
• BAB/J/008 Notation of units. Calculating axes.
• BAB/J/009 Notation of units.
• BAB/J/010 Notation of units.
• BAB/J/011 Notation of units.
• BAB/J/012 Notation of units.
• BAB/J/013 Notation of units.
• BAB/J/014 Notation of units.
• BAB/J/015 Notation of units. Motions of the printing apparatus.
• BAB/J/016 Notation of units.
• BAB/J/017 Notation of units.
• BAB/J/018 There is no archive material for this item although the reference was included in the previous finding aid.
• BAB/J/019 There is no archive material for this item although the reference was included in the previous finding aid.
• BAB/J/020 There is no archive material for this item although the reference was included in the previous finding aid. This is actually Notation F 386.
• BAB/J/021 General trains. Circular motion of axes.
• BAB/J/022 Trains. Vertical motions of axes.
• BAB/J/023 Printing and punching.
• BAB/J/024 Trains for stereotype frames.
• BAB/J/025 Times of action.
• BAB/J/026 General trains.
• BAB/J/027 General trains to be used with Sheets 1 to 4 of the special trains on drawing paper.
• BAB/J/028 Analytical and Difference Engine. Notations of units. Copper plate moving.
• BAB/J/029 There is no archive material for this item although the reference was included in the previous finding aid. This is actually notation F383/1.
• BAB/J/030 There is no archive material for this item although the reference was included in the previous finding aid. This is actually Notation F 383/2.
• BAB/J/031 Trains to stereotype.
• BAB/J/032 Commencement of trains.
• BAB/J/033 Printing. Analytical and Difference Engine.
• BAB/J/034 Direct trains. Third edition [possibly version].
• BAB/J/035 Complete analysis of trains. Second Edition [possibly version].
• BAB/J/036 Stereotype plate movements. Fourth Edition [possibly version].
• BAB/J/037 Calculating.
• BAB/J/038 Notation of units. First Edition [possibly version].
• BAB/J/039 The trains.
• BAB/J/040 The trains. Calculating. Second Edition [possibly version].
• BAB/J/041 Calculation.
• BAB/J/042 Comparison of two modes of moving matrix frame.
• BAB/J/043 Description of copper plate moving apparatus.
• BAB/J/044 Number of parts and working points.
• BAB/K Drawings of Difference Engine No. 1
• BAB/K/003 Frame for holding the copper.
• BAB/K/058 Framing plate and details of rejected plans.
• BAB/K/062 Calculating machine.
• BAB/K/079 End view of general platform and end framing plate.
• BAB/K/087 End views of printing part, frame and castor.
• BAB/K/094 Wheel for three figure motion, indispensable element.
• BAB/K/001 End view of printing part nearly all of which has been altered since this was drawn.
• BAB/K/002 Endless screw, clutches, etc. for moving the copper.
• BAB/K/027 Plan of machinery intended to be attached to planing machine.
• BAB/K/029 First 60 wheel & 7 levers - old plan.
• BAB/K/031 Calculating Machine.
• BAB/K/033 Type Sectors.
• BAB/K/034 Forces of punches.
• BAB/K/040 Untitled.
• BAB/K/042 Levers for cones, single teeth, &c.
• BAB/K/043 3 figure motion.
• BAB/K/044 Untitled.
• BAB/K/071 untitled
• BAB/K/075 Untitled
• BAB/K/077 Untitled
• BAB/K/078 Endviews of general platform. Plan of framing plates next type sector etc.
• BAB/K/080 Untitled
• BAB/K/081 Untitled
• BAB/K/082 Untitled
• BAB/K/083 Untitled
• BAB/L Notations of calculations for the Analytical Engine
• BAB/L/001 Solution of two simultaneous equations
• BAB/L/002 Notation for the coefficients of the powers of x. Computation of the coefficients of a polynomial from those of another divided by a linear term.
• BAB/L/003 Computation of the coefficients of a polynomial from those of another divided by a quadratic term
• BAB/L/004 Solution of a single linear equation and reduction of two simultaneous equations in two variables to two independent linear equations.
• BAB/L/005 Reduction of three simultaneous equations in three variables to two simultaneous equations in two variables.
• BAB/L/006 Reduction of three simultaneous equations in three variables to two simultaneous equations in two variables.
• BAB/L/007 Reduction of four simultaneous equations in four variables to three simultaneous equations in three variables.
• BAB/L/008 Tabulation of a quadratic by differences. Calculation of a rational integral function of the second degree by differences.
• BAB/L/009 Tabulation of a cubic by differences.
• BAB/L/010 Tabulation of a quartic by differences.
• BAB/L/011 Generation of terms of a series by a recurrence relation based on terms of other series.
• BAB/L/012 Generation of terms of a series by a recurrence relation based on quadratic functions.
• BAB/L/013 Generation of the coefficients in the product of two polynomials.
• BAB/L/014 Generation of the coefficients in the product of two cosine series.
• BAB/L/015 Notation for determining the value of x from the three equations. Successive reduction of three simultaneous equations in three variables to find the solution for one variable.
• BAB/L/016 Successive reduction of simultaneous equations.
• BAB/L/016/1 Sheet 1. Successive reduction of three simultaneous equations in three variables to find the solution for one variable.
• BAB/L/016/2 Sheet 2. Successive reduction of five simultaneous equations in five variables to find the solution for one variable.
• BAB/L/017 Notation for computing the elliptic radius vector by having the eccentricity and the mean anomaly.
• BAB/L/018 Notation for computing the elliptic radius vector by having the eccentricity and the mean anomaly.
• BAB/L/019 Notation of the reduction of the four equations. Reduction of four simultaneous equations in four variables to three simultaneous equations in three variables.
• BAB/L/020 Notation of the reduction of the three equations. Successive reductions of three simultaneous equations in three variables to find the value of one variable.
• BAB/L/021 Reduction of the four equations. Reduction of four simultaneous equations in four variables to three simultaneous equations in three variables.
• BAB/L/022 Reduction of the three equations. Successive reductions of three simultaneous equations in three variables to find the value of one variable.
• BAB/L/023 Notation of a formula for multiplication. Use of combinatorial cards in the computation of the coefficients in the product of two polynomials.
• BAB/L/024 Generation of terms of a series by recurrence relations based on quadratic and linear functions.
• BAB/L/025 Algebraic notation. Tabulation of the elliptic radius vector from the eccentricity and the mean anomaly.
• BAB/L/026 Calculation of the numerical value of a formula. Computation of a simple formula by two methods.
• BAB/L/027 List of variables, their signs and coefficients.
• BAB/M Stereotype drawings
• BAB/N History Sheets of the Analytical Engine
• BAB/N/001 History: beginning of September 1834 to the end of December 1834, both inclusive.
• BAB/N/002 History sheet for 1835
• BAB/N/003 History sheet for 1836
• BAB/N/004 History.
• BAB/N/005 History.
• BAB/N/006 History.
• BAB/N/007 History.
• BAB/N/008 History.
• BAB/N/009 History.
• BAB/N/010 History.
• BAB/N/011 History.
• BAB/N/012 History.
• BAB/N/013 History.
• BAB/N/014 History.
• BAB/N/015 History.
• BAB/N/016 History.
• BAB/N/017 History.
• BAB/N/018 History.
• BAB/N/019 History.
• BAB/N/020 History.
• BAB/N/021 History.
• BAB/N/022 History.
• BAB/O Formulas relating to programs
• BAB/O/001 Multinomial or Polynomial Theorem
• BAB/O/002 Untitled. [Algebraic developments relating to various calculations]
• BAB/O/003 Untitled. [Algebraic developments relating to various calculations]
• BAB/O/004 Sturm's Theorem.
• BAB/O/005 [Table of figures] from Mr. Barnett.
• BAB/P Drawings of the Analytical Engine, Second Phase.
• BAB/P/046 A rough draft of apparatus for reducing the two top figures to zero. Each sketch is superseded by Figures 1 and 2. Sketch of carriage with joint in frame. See Figures 3 and 4.
• BAB/P/159 Analytical Engine (appears incomplete).
• BAB/P/160 General Plan. Sheet 42.
• BAB/P/161 Elevation of the Analytical Engine. Counting and stepping apparatus.
• BAB/P/162 Untitled. Shows plans and elevations of store wheels, mill, mill wheel cages, carriages and framing.
• BAB/P/163 Elevations and plans of printing apparatus. Experimental sketches for mill and store plans.
• BAB/P/164 Plan of part of the Analytical Engine. Quarto size.
• BAB/P/165 Combination of cams, platform and stop bolts. Selectors for table. Elevation.
• BAB/P/166 Parts of plan, elevation and section of rising platforms for store. Superseded in following sheet.
• BAB/P/167 Plan of bolts for store.
• BAB/P/168 Plan and side elevation of table axis with combination of cams and platforms. Plan and end elevation of mill showing a combination of cams, platforms, stop bolts and barrels.
• BAB/P/169 Rough draft of mill and driving without platforms.
• BAB/P/170 Untitled, probably plan and elevation.
• BAB/P/171 Sketches of axes, bolts and levers.
• BAB/P/172 Untitled. Probably sketch of various cam apparatus.
• BAB/P/173 Driving of mill axis. Appears incomplete.
• BAB/P/174 Untitled. Appears to be a machine tool slide.
• BAB/P/175 A figure wheel around which a carriage could be arranged.
• BAB/P/176 Untitled. Probably a plan and elevation.
• BAB/P/177 Improved table for shaping machine.
• BAB/P/178 Detailed sketches of moving parts. Untitled.
• BAB/P/179 Hoarding and anticipating carriages.
• BAB/P/180 Hoarding carriage.
• BAB/P/190 Untitled details. Incomplete.
• BAB/P/191 Untitled details. Incomplete.
• BAB/P/192 No. 6 half ten. No. 7 whole zero. Incomplete details.
• BAB/P/193 Circular half zero carriage. Plans No. 8 - 10.
• BAB/P/194 Selectors for division and multiplication.
• BAB/P/195 Counting digits, end elevation and printing side elevation.
• BAB/P/196 Figure No. 11. Half zero carriage with hoarding. Incomplete details.
• BAB/P/197 Plans for store variables.
• BAB/P/198 Adding column with motion for changing from plus to minus. Incomplete.
• BAB/P/199 Untitled. A model of six cages was made from this drawing. Incomplete.
• BAB/P/200 Whole zero and half zero, three figures.
• BAB/P/201 Whole zero and half zero.
• BAB/P/202 Half size plan and side elevation of three moveable platforms. Of which the two levers are abolished.
• BAB/P/203 Plans for figure wheels, area for reducing to neutral position, carriage axes and locking arms.
• BAB/P/205 Untitled plan and elevation. Incomplete.
• BAB/P/207 Plan and elevation of bolts for each axis in the mill and motion for raising platform.
• BAB/P/210 Motions for reducing the two upper figures to zero in division.
• BAB/Q Miscellaneous mechanical notations
• BAB/Q/001 Specimens of description.
• BAB/Q/001/1 Principles to be followed in the description of the constituent portions of the Analytical Engine.
• BAB/Q/002 On putting letters to drawings, in draft.
• BAB/Q/003 Drafts and rough notes.
• BAB/Q/003/1 Mechanical notation
• BAB/Q/003/2 Rough notes and sketches, including drawings of Babbage's game 'Tit Tat Toe'.
• BAB/Q/004 Untitled. [Arrows indicating different forms of drive and connection].
• BAB/Q/005 Untitled [Arrows indicating different forms of drive and connection].
• BAB/Q/006 Untitled [Arrows indicating different forms of drive and connection].
• BAB/Q/007 Rough notes of algebraic formulae, including some symbols of form.
• BAB/R Catalogues and indexes of Babbage's papers relating to his calculating engines
• BAB/R/001 Index to drawings
• BAB/R/002 Index to drawings No. 1 to 62, describing the figures in each drawing.
• BAB/R/003 The drawings of the new engine arranged according to the subjects in an alphabetical order.
• BAB/R/004 The drawings of the New Engine arranged according to the subjects alphabetically. Analytical.
• BAB/R/005 Catalogue of the drawings of the New Analytical Engine.
• BAB/R/006 List of notations copied and read off.
• BAB/R/007 Catalogue of 386 notations with their classification.
• BAB/R/008 List of designs. Cross reference list, showing numbers of drawings, pages of sketch books and numbers of notations.
• BAB/R/009 Duplicate. Index to the drawings. Cross reference list.
• BAB/R/010 Corrected printed proofs and sheets of lists in H.P. Babbage's 'Calculating Engines', enclosed in a manuscript cover. It includes a manuscript list of tool drawings.
• BAB/R/011 Corrected printed proof sheets for the catalogue of notations in H.P. Babbage's 'Calculating Engines'.
• BAB/R/012 List of notations and drawings in the tin case. Taken to Turin in 1840.
• BAB/R/013 List of sizes of the notations of the Analytical Engine.
• BAB/R/014 List of plates.
• BAB/T Universal Machine Tool
• BAB/T/001 Universal Tool Notebook.
• BAB/T/001/1 First of the six 'Universal Tool' sheets.
• BAB/T/001/2 Continuation of sheet T/1/1
• BAB/T/001/3 Continuation of sheet T/1/2. Second Edition.
• BAB/T/001/4 Continuation of sheet T/1/3
• BAB/T/001/5 Continuation of sheet T/1/4
• BAB/T/001/6 Continuation of sheet T/1/5
• BAB/T/002 Section through cross slide with part of its elevation. Drawing. Sheet 3.
• BAB/T/003 Tool holder for universal machines. Drawing.
• BAB/U Difference Engine No. 1. Drawings, notations, manuscripts and printed extracts.
• BAB/U/001 Plan and side elevation of Difference Engine.
• BAB/U/002 End elevation of the Difference Engine.
• BAB/U/003 Copy of drawing of end elevation of the lower portion of the calculating part of the Difference Engine.
• BAB/U/004 End elevation. Difference Engine 1823 - 1833. Drive.
• BAB/U/005 Plan of Difference Engine 1823 - 1833. Calculating part.
• BAB/U/006 First Difference Engine before 1834. Incomplete and unfinished notation, includes 'C.B. 1849' in the title.
• BAB/U/007 Untitled notations.
• BAB/U/008 Number no longer in use. Re-numbered as BAB U/3.
• BAB/U/009 Number no longer in use. Re-numbered as BAB U/1[a].
• BAB/U/010 Number no longer in use. Re-numbered as BAB U/1[b].
• BAB/U/011 Number no longer in use. Re-numbered as BAB U/2[a] and BAB U/2[b].
• BAB/U/012 Timing notation of calculating part.
• BAB/U/013 Extracts in French from M. de Prony's tables.
• BAB/U/014 Printed broad sheet entitled 'Babbage's Calculating Machine' by B. Herschel Babbage.
• BAB/V Difference Engine No. 2. Notations and indexes.
• BAB/V/001 Motions of the calculating part of the Difference Engine.
• BAB/V/002 Notations of positions (vertical) for a Difference Engine as seen in drawings 180 - 183.
• BAB/V/003 Difference Engine index of parts.
• BAB/V/004 Index of Difference Engine No. 2.
• BAB/V/005 Index of Difference Engine No. 2
• BAB/W Draft notes and drawings relating to the first phase of work on the Analytical Engine from 1833-1848
• BAB/W/001 A draft drawing labelled 'Sheet 3', showing card adding axis, mill adding axis, figure wheels, warning bar and lever and tens lifting slide.
• BAB/W/002 List of letters with the numbers of the drawings on which they occur.
• BAB/W/002/1 List of letters with the numbers of the drawings on which they occur. Sheet 1.
• BAB/W/002/2 List of letters with the numbers of the drawings on which they occur. Sheet 2.
• BAB/W/003 The drawings of the New Engine arranged according to the subjects, alphabetically. Re-catalogued as BAB R/3 and BAB R/4.
• BAB/W/004 Trains of the Analytical Engine. Third Edition.
• BAB/W/005 Letters (mechanical notation) used to indicate the most important parts of Plan 28a.
• BAB/W/006 Abstracts of the various plans of the calculating engine.
• BAB/W/007 Figure for notation 181.
• BAB/W/008 Draft copy of Plan 28, dated 28 December 1842.
• BAB/W/009 Analytical Engine Plan 28. Scale 1/6. Draft.
• BAB/W/010 Counting apparatus. Arrangement of wheels.
• BAB/W/011 Scraps and sketches that have been copied. Probably refers to the Analytical Engine.
• BAB/X Draft sketches relating to the second phase of work on the Analytical Engine from 1857-1872
• BAB/X/001 Locking motions for carriage column.
• BAB/X/002 Sketch of driving.
• BAB/X/003 Sketch of mould for adding column collars.
• BAB/X/004 Sketch of framing for support cross driving axis and framing axis.
• BAB/X/005 Plan of the Analytical Engine. Includes representative timings.
• BAB/X/006 Untitled cardboard model.
• BAB/X/007 Sketch described as '32 teeth to be cut into this mould, 3/16 pitch'.
• BAB/X/008 Untitled. [Drawings of cams]
• BAB/X/009 Untitled rough sketch of machine parts.
• BAB/X/010 Special trains of notation for anticipating carriage of the Analytical Engine. Sheet No. 1.
• BAB/Y Miscellaneous papers relating to H.P. Babbage's 'Mill' of the Analytical Engine
• BAB/Y/001 Machine patterns for Machines 1 - 4, comprising four sheets
• BAB/Y/001/1 My Machine I pattern for cast iron (base) ...
• BAB/Y/001/2 My Machine 1888 II Plan of driving cams, levers, etc. in initial position.
• BAB/Y/001/3 My Machine 1889 III Development of driving cams.
• BAB/Y/001/4 My Machine 1883 - 1895 IV Copied and corrected from a former drawing.
• BAB/Z Papers relating to the Scheutz's Difference Engine
• BAB/Z/001 Drawings of the Difference Engine, comprising four sheets.
• BAB/Z/001/1 Drawing of the Difference Engine
• BAB/Z/001/2 Drawing. Sheet 2, unmounted
• BAB/Z/001/3 Drawing, sheet 3, un-mounted.
• BAB/Z/001/4 Drawing, sheet 4, un-mounted.
• BAB/Z/002 Part of the end view of the Difference Engine
• BAB/S Sketch books and scribbling books
• BAB/S/1 First series of scribbling books of notations, sketches and calculations of the Difference and Analytical Engines
• BAB/S/1/01 Tool Book. Volume I. Discussion and sketches of tools.
• BAB/S/1/02 Scribbling Book Volume II
• BAB/S/1/03 Sketch Book Volume III
• BAB/S/1/11 Scribbling Book Volume XI
• BAB/S/1/04 Sketch Book Volume IV
• BAB/S/1/05 Scribbling Book Volume V. Important matter of history in the Analytical Engine.
• BAB/S/1/06 Sketch Book Volume VI
• BAB/S/1/07 Scribbling Book Volume VII. Analytical Engine.
• BAB/S/1/08 Scribbling Book Volume VIII
• BAB/S/1/09 Scribbling Book Volume IX
• BAB/S/1/10 Scribbling Book Volume X.
• BAB/S/1/12 Scribbling Book Volume XII. List of parts of the Engine, before August 1821.
• BAB/S/1/13 Scribbling Book Volume XIII. Sketch of the history of the new calculating engine.
• BAB/S/1/14 Scribbling Book Volume XIV. Travelling Scribbling Book.
• BAB/S/1/15 Scribbling Book Volume XV. Containing various developments of series for the Analytical Engine, molecules elliptic, and various developments.
• BAB/S/1/16 Scribbling Book Vol XVI. Various analytical developments adapted to engine.
• BAB/S/2 Second series of scribbling books of a later date.
• BAB/S/2/1 Scribbling Book Volume X
• BAB/S/2/2 Scribbling Book Vol XI. Drawing Office.
• BAB/S/2/3 Scribbling Book Volume XIA.
• BAB/S/2/4 Scribbling Book Volume XII. Drawing Office.
• BAB/S/3 Third series of scribbling books
• BAB/S/3/1 Untitled.[Rough sketches of machine parts and tools].
• BAB/S/3/2 Untitled.
• BAB/S/3/3 Untitled. [Operations for the Analytical Engine]
• BAB/S/3/4 Untitled. [Notations 224 and 321. List of operations.]
• BAB/S/4 Bound notebooks of draft notations and sketches of notations.
• BAB/S/4/1 Draft Notations and Sketches of Notations.
• BAB/S/4/2 Draft Notations and Sketches of Notations: Cases
• BAB/S/4/3 Draft Notations and Sketches of Notations
• BAB/M Stereotype drawings
• BAB/M/001 Plan of the figure wheels for one method of adding numbers.
• BAB/M/002 Adding axis and wheels without framing
• BAB/M/003 Frame of adding wheels
• BAB/M/004 Section of adding wheels and framing.
• BAB/M/005 Section of adding and sign axes and wheels frames, et cetera. Complete.
• BAB/M/006 Impression from original wood cut from which No. 7 is a stereotype plate with letters and signs inserted.
• BAB/M/007 Stereotype cast from wooden block No. 6 with letters and signs inserted.
• BAB/M/008 Plan of adding wheels, and of long and short pinions.
• BAB/M/009 Long pinions in the position for adding. Adding wheels and short pinions behind long pinions.
• BAB/M/010 Long pinions in the position for stepping. Adding wheels and short pinions behind long wheels.
• BAB/M/011 Plan of carriage by anticipation.
• BAB/M/012 Fixed and moveable wires of the anticipating carriage. One third the real wire.
• BAB/M/013 Carriage by anticipation.
• BAB/M/014 Description of the mechanism for addition.