Rabdologiae, Seu Numerationis Per Virgulas Libri Duo

by Napier, John

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image of Rabdologiae seu Numerationis per Virgulas libri duo: Cum Appendice de expeditissimo Multiplicationis promptuario. Quibus accessit & Arithmeticae Localis Liber unus

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Nine folding tables (woodcut & letterpress), & numerous woodcut diagrams & tables in the text. 6 p.l., 139 pp., 2 blank leaves. 12mo, cont. mottled calf (very slightly rubbed), panelled in gilt. Leyden: P. Rammasen, 1628. Third edition; this edition is much rarer than the first edition of 1617. This is the first description of a calculating machine. … Read more
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image of Rabdologiae seu numerationis per virgulas libri duo: cum appendice de expeditissimo multiplicationis promptuario. Quibus accessit_arithmeticae localis liber unus. Leiden: Petrus Rammasenius, 1628 [NAPIER'S BONE OR RODS, THE 1ST CALCULATING MACHINES]

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Leiden: Petrus Rammasenius, 1628. 3rd Edition. THIRD EDITION OF THE INVENTION & DESCRIPTION OF NAPIER'S BONES, THE 1st CALCULATING MACHINES & THE "PRECURSORS OF SEVENTEENTH-CENTURY AND MODERN CALCULATING MACHINES AND COMPUTERS" (Printing and the Mind of Man 116). Napier's invention, essentially a system of rods, offered a mechanical means for facilitating computation. Note that this work "also contains the… Read more
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£5,254.20