Gottfried Wilhelm Leibniz

German polymath and philosopher

Leibniz made major contributions to physics and technology, and anticipated notions that surfaced much later in philosophy, probability theory, biology, medicine, geology, psychology, linguistics, and computer science. He became one of the most prolific inventors in the field of mechanical calculators. While working on adding automatic multiplication and division to Pascal's calculator, he was the first to describe a pinwheel calculator in 1685 and invented the Leibniz wheel, used in the arithmometer, the first mass-produced mechanical calculator. He also refined the binary number system, which is the foundation of virtually all digital computers.

Source: Wikipedia

Leibniz, Gottfried Wilhelm

Philosoph und Mathematiker (1646-1716). Autogr. document. O. O. u. D. 1 S. Ca. 110 x 30 mm.
$ 7,335 / 6.500 € (940976/BN940976)

Fragment of a bibliographic note about a mathematical work by the astronomer Henry Gellibrand: "and logarithms. With the application thereof to Questions of Astronomie and Navigation. By H. Gellibrand, Prof. of Astronomie in Gresham Colledge. II. Edition corrected and enlarged. London MDCLII." The work in question is the second edition of Gresham's "An institution trigonometricall, wherein demonstratively and perspicuously is exhibited the doctrine of the dimension of plain and spherical triangles, after the most exact and compendious way, by tables both of sines, tangents, secants, and logarithms".

- Early 19th century certification of authenticity by the educator Peter Heinrich Holthaus (1759-1831) on the reserve: "Nach Kästner's Zeugniß in einem (nicht zu theilenden) Briefe an den vormahligen Prediger Müller in Schwelm [the theologian, mathematician and astronomer Friedrich Christoph Müller, 1751-1808] ist diese Handschrift von Leibnitz. - P. H. Holthaus". The Göttingen mathematician and writer of epigrams Abraham Gotthelf Kästner (1719-1800) had studied Leibniz's manuscript papers at the Royal Library in Hanover and composed the preface for the posthumous first edition of the "Nouveaux essais sur l'entendement humain", aimed at John Locke (in the "Oeuvres philosophiques latines & françoises de feu Mr. de Leibnitz", edited by R. E. Raspe in 1764). The verso also shows a probably slightly earlier note "Leibnitz" in a different hand..

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Leibniz, Gottfried Wilhelm

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Gottfried Wilhelm Leibniz (1646–1716), philosopher and mathematican. Autograph document signed. Wolfenbüttel, 12. II. 1695. ½ p. Oblong small 4to. – Order to pay part of his salery to the Hofrat of Hanover: „Der Geheime Cammer Secretarius H. Johann Urban Müller wird dienstl ersuchet auf abschlag meiner besoldung an den H. Küchschreiber alhier Vierzig Thaler zu bezahlen [...] | Gottfried Wilhelm Leibniz mp“. – Below a four lined receipt by Christoph Balcke. - Some spots.