CURTA, Type II Calculating machine consisting of a cylinder capable of performin…

Description

CURTA, Type II

Calculating machine consisting of a cylinder capable of performing 4 arithmetic operations and square roots. Numbered 512544. H. 11 cm. In its case.

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CURTA, Type II

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Starting price 120 EUR

FABRE Jean Antoine Essai sur la manière la plus avantageuse de construire les machines hydrauliques et en particulier les moulins à bled. Paris, Jombert, 1783. In-4°, faux-titre - title - 2 ffnch - xvi - 402 pp & 6 filled plates (wetness at bottom of volume). Bound in contemporary full marbled basane, 5-rib spine decorated with gilt fillets (corners dulled, jaws split). First edition of this treatise, to be placed in the period immediately following the great famines of 1769 and 1770. It is closely related to Parmentier's efforts to find alternative sources of flour, and to optimize mill operations. The first part of the work deals with the calculation of hydraulic machines; the second is devoted to the construction of wheat mills and the calculation of their driving elements, as well as the effects of water on them; the third part gives technical rules for calculating gears, feed canals, runners and locks.

Estim. 300 - 400 EUR

English calculator cane, with unscrewable brass and bone knob, revealing a cylinder marked Scale n°429 Copyright Otis Kings Patent n°183725, the shaft in Malacca rush.

Estim. 100 - 200 EUR

Object: (18) collection of calculating machines / cross calculators including Arithma, Master, Meiwa Alexe, Multator, Addiator, Produx, Wizard + Chinese abacus

Estim. 20 - 30 EUR

TAVERNIER GRAVET Compositional slide rule. In case. Length 29.5 cm Wear

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