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Collection of letters signed by scientists, physicians and engineers, generally on scientific or professional matters

Volume entitled: "Chemistry Lecture Notes"

Letter from Henry Maudslay to Mr Matthew Murray, Engineer

Marshall's Geological Diagrams

Manuscript entitled: "Catalogue of the Apparatus of Philosophical Instruments, in the Collection of Her Late Majesty Queen Charlotte, at the Observatory at Richmond in Surrey"

Collection of letters and accounts relating to Richard Trevithick's patent on a portable high pressure steam engine

Letter from Robert Bill to Messrs Haynes and Douglas

Statement of accounts between Messrs Trevithick and Co and Samuel Homfray

Copy [bill] London [to] Navy Commissrs./John Rennie, [for] Cast Iron Diving Bell, [pumps and machinery parts etc Reference to the 'Sheerness Diving Bell'. Bears note re the bell/Goodrich, and note from the Navy Office on verso]

Drawing entitled 'Sectional Drawing for a Steel Protected Cruiser for Colonial Defence to be named'

Letter from Samuel Homfray to Messrs Haynes and Douglas

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

Letter from Messrs Blagrave and Walter to Messrs Haynes and Douglas and a copy of a letter Samuel Homfray to Messrs Blagrave and Walter

Elevation of parts of middle group drawn in plan on No. 127.

Coloured drawing of Elevations of the (Locomotive) Rocket

Plan of Steam Boiler for Susquehana Locomotive

Cross-written letter from Miss Smith to Jane Young (nee Hackworth), Vilvorde, Belgium

Gearing et cetera of Sketch dated July 31 1835. Plan, once part of Drawing 22.

Grouping arrangement. Abandoned end April 1835.

Method of grouping for the large machine.

Carriage by vertical chain. Plan, elevation.

Sketches of mill used for arranging operations on the engine of four wheels in each cage from April 1836 - August 1837.

Elevation of arrangement 13 with some of the driving and directive. Elevation includes section of a barrel '65 bands 80 verticals'.

Intended for engraving. Shows six barrels with reducing apparatus.

Plan of the left half to middle group for General Plan 28.

Sketch of an apparatus for advancing stereotype frames of the Difference Engine by cranks and backing them by weights. Superseded. Plan, elevation.

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

Motions of the printing apparatus

Motions of the stereotype frames

Circular motions of the calculating axes

Motions of the stereotype frames

Standard case of approximate multiplication. Sheet 3 of 4.

Approximative division. Standard case. Sheet 4 of 12.

Division, continued. Sheet 2 of 12.

Multiplication. Sheet 1 of 4.

36 variations of approximative division. Sheet 12 of 12.

Approximative division, continued. Sheet 10 of 12.

Verticals for multiplication. Notation 108.

Untitled pencil layout, includes mill racks.

Approximative division, continued. Sheet 7 of 12.

Approximative division, continued. Sheet 8 of 12.

Verticals for division. Sheet 1 of 4.

Verticals for approximative division. Sheet 2 of 4.

Notation of approximative multiplication.

Selectors, drawings 82 and 83, using. Sheet 2 of 4.

Addition.

Selectors, drawings 82 and 83, reducing to zero. Sheet 4 of 4.

Cases of common multiplication and their corresponding variations introduced. Sheet 1 of 7.

Verticals for approximative division. Sheet 4 of 4.

Selectors, drawings 82 and 83.