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Plan for existing system of two racks. Arrangement plan and four detail elevations.

Plan and elevation of a platform for giving circular motion to axes applied as an experiment to the Difference Engine No. 2. Drawing 163.

Mechanical notation

Sketch of a plan for reserving the carriages.

Cases of approximative multiplication with the arbitrary variations introduced. Sheets 2 - 7 of 7.

The first drawing of the circular arrangement of the new engine

Cases of common and approximative multiplication and their corresponding variations introduced.

Untitled. Appears to be layout of axes on framing of Difference Engine No. 2. Plan of the calculating axis and framing of the Difference Engine.

Addition No. 4. Carriage No 6. Elevation and plan.

Figure 1. Plan, elevation and detail.

Tabulation of a cubic by differences

Cases of common and approximative multiplication and division.

Calculating machine.

Calculation of the numerical value of a formula

Trains. Vertical motions of axes.

Drawings of Difference Engine No. 1

Carriage No. 8. Figure 1. Method of carrying. Plan, elevation.

Division as performed with General Plans 28 and 28a and mill counting apparatus. Sheet 1 of 15.

Drawing of the parts controlling the positioning and punching of the decimal point

Figure 3. Zero Apparatus No. 1. Improved arrangement of snails, figure wheels et cetera for design dated 27 November 1834 and also for a design dated 24 January 1835. Elevation.

Catalogue of 386 notations with their classification.

Plan 27. Linear arrangement with letter notations.

Plans of parts of one of the selectors belonging to either of the nine multiples. Plan.

Trains of division. Standard Case. Sheet 1 of 7.

No. 1 lifters for the purpose of division by table. Notation and description in sheets 11 and 12 of large quarto notations. Plan, elevation.

Figure 1. Stepping No. 2. Sketch to examine a method of multiplication by stepping. Plan, elevation.

Elevations and sections of feed motions. Fourth revision.

Sketch of a method of multiplication by means of the directive power stepping. Plans, elevations and details.

Plan of the Analytical Engine without lettering.

Paper rollers of the printing apparatus for the Analytical and Difference Engines. Superseded. Plan, elevation.

Apparatus for combining incommensurable cycles. Plan, elevation.

Parts of slide for the Planing machine. Plan, elevation

Motions of the stereotype frames

Long pinion for giving off complement. Plan, elevation.

Is A.180x intended

Plan 16. Arrangement, several partial arrangements, numerous notes.

Consecutive counting apparatus.

Stepping No. 1 on or in central wheels. Figure 1. Figure 2. Various unnumbered elevations, plans and details.

Skeleton of vertical motions for all operations. Left group. Sheet 2 of 3.

Vertical positions of the wheels of Plan 28. Sheet 1 of 23.

Tabulation of a quartic by differences

Trains to stereotype.

Wanting tooth for long stepping. Rough sketches for carriage. Attempt at break and joint for carriage.

Three figure motion

Notation of the Analytical Engine

Motions of the printing apparatus

Elevation of parts of the card counting apparatus for operation and variable cards.

Apparatus for moving stereotype frames for Analytical and Difference Engines. Plan, elevation.

Bars and levers for lifting axes of the Difference Engine No. 2. Plan.

End view of inking printing paper and stereotype apparatus.