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Scribbling Book Vol XVI. Various analytical developments adapted to engine.

Opened out view of figure wheels, 1-42.

Mill counting apparatus. Consecutive plan.

Notation of a formula for multiplication

Mill counting apparatus. Consecutive elevation.

Wheels for driving the adding axes. Plan.

Plan of consecutive mill counting apparatus for General Plan 28. Plan, note.

Plan, elevation and section of cross slide.

First sketch of all the parts in plan of the right half to middle group of General Plan 28. Plan, elevation.

Revised plan of mill. Sheet 27.

Plan and new method of counting off for mill counting apparatus. Elevation, detail.

Plan 21, store on a rack. Arrangement.

Plan of the calculating part with the means of conveying numbers to stereotype sectors. Tracing of BAB A/176.

Untitled.[Rough sketches of machine parts and tools].

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 Superseded.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

Lifters for selecting the multiple of the Multiplicand or Divisor. Plan, two elevations.

Apparatus for combining incommensurable cycles. Plan, elevation.

Sketch of drilling machine. Details.

Parts of slide for the Planing machine. Plan, elevation

Intended for engraving. Shows six barrels with reducing apparatus.

Plan 17, store on a rack. Arrangement.

Motions of the stereotype frames

Long pinion for giving off complement. Plan, elevation.

Plan titled, 'Various arrangements proposed, examined and rejected between the rejection of Plan 27 and the adoption of Plan 28. Figures 1, 2, 3, 4, 9. Various', and a folded sheet of notes

Plan of part of framing of Drawing 161. Tracing of BAB A/161.

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

History.

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

17 items

Letters from George Boole, Charles Babbage and other computer experts

General plan and details of cams for driving calculating axis. Also the disconnecting apparatus. First mover. Tracing of BAB A/159.

Barrels for square root.

Motion for carrying the tens, plus and minus.

Mechanical notation

General Plan. Sheet 42.

List of variables, their signs and coefficients

Scribbling Book Volume XIII. Sketch of the history of the new calculating engine.

Motions of the printing apparatus

Plan of an improved carriage by vertical chain, and a page of handwritten notes

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

Long pinion for giving off complement.

Sturm's Theorem.

Letters (mechanical notation) used to indicate the most important parts of Plan 28a.

Tabulation of a quadratic by differences

Plan of barrel and reducing apparatus

Sundry axes and wheels for Plan 28.

Parts of the slide for the Planing machine. Plan, elevation.

Plan of part of framing of Drawing 161. Tracing of BAB A/161.

Sketches of groups.

Sketch of sectors for giving vertical motion to axes, arrangement.

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