Page:Passages from the Life of a Philosopher.djvu/171

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CALCULATING MACHINES OFFERED.
155
3. An original set of Napier's bones.

4. A small Arithmetical Machine, by Viscount Mahon, afterwards Earl Stanhope. Without date.

5. A larger Machine, to add, subtract, multiply, and divide, by Viscount Mahon. 1775.

6. Another similar Machine, of a somewhat different construction, for the same operations, by Viscount Mahon. 1777.

7. A small Difference Engine, made in London, in consequence of its author having read Dr. Lardner's article in the "Edinburgh Review" of July, 1834, No. CXX.




List of Mechanical Notations proposed to be Lent for the Exhibition.

1. All the drawings explaining the principles of the Mechanical Notation. 2. The complete Mechanical Notations of the Swedish Calculating Engine of M. Scheutz.
These latter drawings had been made and used by my youngest son Major Henry P. Babbage, now resident in India, in explaining the principles of the Mechanical Notation at the meeting of the British Association at Glasgow, and afterwards in London, at a meeting of the Institution of Civil Engineers.[1]
3. The Mechanical Notations of the Difference Engine No. 1.
  1. See Proceedings of British Association at Glasgow, 1855, p. 203; also Minutes of Proceedings of the Institution of Civil Engineers, vol. xv., 1856.