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BABBAGE, CHARLES. 1791-1871. On a Method of Expressing by Signs the Action of Machinery. London: W. Nicol, 1826. image 1
BABBAGE, CHARLES. 1791-1871. On a Method of Expressing by Signs the Action of Machinery. London: W. Nicol, 1826. image 2
BABBAGE, CHARLES. 1791-1871. On a Method of Expressing by Signs the Action of Machinery. London: W. Nicol, 1826. image 3
Lot 11

BABBAGE, CHARLES. 1791-1871.
On a Method of Expressing by Signs the Action of Machinery. London: W. Nicol, 1826.

4 December 2019, 13:00 EST
New York

Sold for US$2,550 inc. premium

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BABBAGE, CHARLES. 1791-1871.

On a Method of Expressing by Signs the Action of Machinery. London: W. Nicol, 1826.
4to (295 x 227 mm). 4 engraved plates, 1 of which is folding. Plain blue paper wrappers; custom blue levant-backed clamshell case. Folding plate linen-backed, light dampstain to lower fore-edge corner of mainly first 2 leaves, title-page toned, wrappers with some chips.
Provenance: Detroit Public Library (stamp to title and final leaf).
WITH: Philosophical Transactions of the Royal Society of London. For the Year MDCCCXXVI. Part III. London: W. Nicol, 1826.
4to (292 x 230 mm). 19 engraved plates. Plain blue paper wrappers, custom cloth folder and blue morocco-backed slipcase. Uncut and unopened, wrappers with spine sunned and chipped, otherwise near fine.

FIRST EDITION OF BOTH THE RARE PRE-PUBLICATION OFFPRINT AND THE ORIGINAL JOURNAL APPEARANCE, the first publication in which he introduced his system of mechanical notation, an elaborate system of notational symbols used to identify parts of his machines and describe their interrelated motions. "The complicated relations which then arose amongst the various parts of the machinery would have baffled the most tenacious memory. I overcame that difficulty by improving and extending a language of signs, the Mechanical Notation, which in 1826 I had explained in a paper printed in the 'Phil. Trans.' By such means I succeeded in mastering trains of investigation so vast in extent that no length of years ever allotted to one individual could otherwise have enabled me to control. By the aid of the Mechanical Notation, the Analytical Engine became a reality: for it became susceptible of demonstration" (Babbage Passages from the Life of a Philosopher 114). Hook & Norman Origins of Cyberspace 37.

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