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ERWIN TOMASH'S COPY

COMRIE, L[eslie] J[ohn]. Inverse interpolation and scientific applications of the national accounting machine.

[London]. Royal Statistical Society, 1936.
8vo. [1], 88-114pp. With two plates. Stitched, as issued, in original publisher's printed wrappers. A trifle creased. Book-label of Erwin Tomash to verso of upper wrapper.
A pamphlet describing the process of inverse interpolation, the technique of finding an estimate of a value of an independent variable x corresponding to a given value of the dependent variable y within the range of the observed values of y. The most significant part of this paper relates to the National Accounting Machine, a machine with several internal registers that astronomer and computing pioneer Leslie John Comrie (1893-1950) used in computing tables and compares favourably to Babbage’s difference engine: ‘it does all that Babbage intended his difference to do and more. At a cost of £500-£600 it is not beyond the means of institutions where extensive computing is undertaken’.

From the recently dispersed library of Erwin Tomash (1921-2012), American engineer recognised for his early pioneering work with computer equipment peripherals. His library consisted of over 3,000 books and manuscripts relevant to the history of computation, from medieval and renaissance works on arithmetic, finger-reckoning and the abacus, to the birth in the twentieth century of theoretical and practical computer science under Alan Turing.
Tomash C 149.
£ 250.00 Antiquates Ref: 22397