Calculating Machines

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Calculating Machines
Item #545 On the Construction of Life Tables, illustrated by a New Life Table of the Healthy...

On the Construction of Life Tables, illustrated by a New Life Table of the Healthy Districts of England. Read April 7, 1859 In: The Philosophical Transactions of the Royal Society of London, 1859, pp. 837-878

London: Royal Society, 1859. 1st Edition. FIRST EDITION OF THE “FIRST PUBLISHED ACCOUNT OF THE APPLICATION OF A MECHANICAL CALCULATOR TO PROBLEMS IN HEALTH OR BIOLOGY” (Hook & Norman, Origins of Cyberspace 2002, Nos. 77 & 85). Complete extract (inclusive of plate) in fine condition. William Farr, widely regarded as..... More

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Item #680 Calcul Mecanique -- Machine a calculer fondee sur l'emploi de la numeration binaire...

Calcul Mecanique -- Machine a calculer fondee sur l'emploi de la numeration binaire (Valtat, pp. 1745-1748) WITH Sur l'emploi de la numeration binaire dans les machines a calculer et les instruments nomomecaniques (Couffignal, 1970-1972) in Comptes Rendus 202, 1936, [VALTAT’S IMPORTANT DESCRIPTION OF HIS PATENTED CALCULATING MACHINE ALSO: COUFFIGNAL ON ELECTRICAL CALCULATORS]

Paris: Gauthier-Villars, 1936. 1st Edition. Full volume. FIRST EDITION OF VALTAT’S DESCRIPTION OF HIS PATENTED CALCULATING MACHINE FOUNDED ON THE CONVERSION OF DECIMAL INPUT INTO BINARY INPUT PRIOR TO CALCULATION. Valtat here notes “that binary digits could be represented either mechanically or electrically. He also stated that in an electric..... More

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