Item YEG-660Instructions for the use of the arithmometer or calculating machine invented by M. Thomas (de Colmar). Prize Medal International exhibition 1862
Paris, Guérin, 1863 8vo of (2), 19, (1) pages et 1 folding plate ; original printed wrapper (spine restored). The first English booklet about the use of the Thomas de Colmar’s arithmometer. The booklet is not from the early, pre-commercial, production of Thomas but it illustres the arithmometer model said.....