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General notation of possible trains. Sheet 1 of 3.

Case of division illustrating the method of selecting + or - quotient figures with one set of selectors.

Working Drawing for No 136 Locomotive

Verticals on one great barrel for algebraic addition. Sheet 4 of 4.

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

Sketches of various notations. Sheet 2 of 2.

Addition and subtraction with signs and position of the verticals.

Selecting apparatus similar to that described in Sketch Book volume 3, page 54.

Engraving of 'Lake Thirlmere or Wythburn Water, Cumberland'

Algebraic addition.

110

Letter from Marc Isambard Brunel to James Walker

260

Letter from Sir Marc Isambard Brunel to Monsieur Lees

Verticals for approximative division. Sheet 2 of 4.

Approximative division, continued. Sheet 8 of 12.

Sketches of various notations.

Steps of the trains. Sheet 5 of 5.

Trains of addition. Sheet 1 of 3.

General notation of directive. First Motion.

Notation of lockings - store. Sheet 3 of 3.

Verticals for multiplication. Notation 108.

Case of division used while discussing the selecting apparatus. Sheet 2 of 3.

General notation of addition and subtraction.

Division. Sketches of various notations.

210

Sketch of a temporary rudder

115

Note from Sir George Biddell Airy to an unnamed correspondent

9 sheets

Engineering drawings for 500 nhp side-lever steam engines completed by Robert Napier & Co. for pioneer transatlantic steamer 'British Queen'

330

Certificate of attendance by Mrs T. Herbert Barker at courses of medical lectures of G.D.Dermott at the Theatre of Anatomy

Bolting plates to divide without table.

Approximative division. Standard case. Sheet 4 of 12.

Two cycles - one of 21 and one of 28 units.

Notation of multiplication with hoarded carriages. Sheet 1 of 4.

Division, continued. Sheet 3 of 12.

Notation of division. Standard Case. Sheet 1 of 12.

Enumeration of trains on groups A F consisting of the axes A F G I 1 I J L O S.

Approximate Division. Standard case to suit Plan 26 Drawing 90 and case on Notation 178.

Multiplication, continued. Sheet 2 of 4.

Selectors. Notation for setting the cams for the nine multiples of 04321.

Extracted from notations F/39, F/42 and F/44 for the purpose of arranging the verticals on the barrels.

Trains of algebraic addition. Sheet 1 of 2.

Sketches of various notations. Sheet 1 of 2.

Case of division used while discussing the selectors. Sheet 1 of 3.

Case of division used while discussing the selecting apparatus. Sheet 3 of 3.

Sketch of a decimal counting apparatus.

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

220

Letter from John Herschel to Captain Beaufort

115

Autograph of James Finlay Weir

205

Extracts from the logs of the Great Western in the form of a letter to Joshua Field

220

Figaro in London

225

Letter from Nathaniel Winch to Miss Knapp

330

'Record of a Meeting' concerning steam ships made by W Laxton