Unbound and self-wrapped. Stitched at inner margin as issued. Contemporary ink number "145" on front page, "157" on recto of final leaf. Fine, in quarter cloth over boards custom chemise, with silk ties.
"It is on the invention of automatic calculating engines that Babbage's posthumous fame largely rests. For all his other interests it is the engines, their design and construction, that dominated his working life... By May 1822 Babbage had completed a small experimental version of his difference engine, so called because of the mathematical principle on which it was based, the method of calculating finite differences. Following the favourable recommendation of the Royal Society in May 1823, and the advocacy of influential supporters, Babbage secured government financial backing for his proposal to construct a larger, fully engineered machine, Difference Engine no. 1. In June 1823 in a private interview with the chancellor, F. J. Robinson, he was granted £1500 from the Civil Contingency Fund to prosecute the venture... Babbage had [his associate] Clement assemble a small section of the engine as a demonstration piece. The assembly, which worked impeccably, represented about one-seventh of the whole machine and was ready towards the end of 1832. This section of Difference Engine no. 1, transferred to the Science Museum, London, in 1862, is the first known automatic calculator and ranks among the most celebrated icons in the prehistory of computing." (Dictionary of National Biography).
HBS # 67812 $2,850