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‎Le Triangle‎

‎Tiphys Batavus sive Histiodromice, De navium cursibus, et re navali. - [COINING THE TERM ""LOXODROME"" AND FORESHADOWING THE DIFFERENTIAL TRIANGLE OF PASCAL]‎

‎Leiden, Elzevier, 1624. 4to (194 x 150 mm). Bound in a beautiful contemporary full calf binding with gilt centrepieces blindstamped lines and four raised bands and gilt ornamentations to spine. Spine neatly restored. Old owner's names to title-page, one of them crossed out. Occassional very light browning or soiling. An excellent copy. With the book-plate of Paul Heilbronner to inside of front board. (54), 109, (1) + (2), 62 (being tables), (1 - errata), (1) pp. + 3 engraved plates (one being in the text, on p. 101, but full-page). Woodcut illustrations and tables in the text.‎

‎Scarce first edition of one of Snell's main works, his important lessons on navigation, in which he coined the term ""loxodrome"" and foreshadowed the differential triangle of Pascal. ""The idea and figure of what is now called the differential triangle had appeared on several occasions before the time of Pascal, and even as early as 1624. Snell, in his ""Tiphys Batavus"", had thought of a small speherical surface bounded by a loxodrome, a circle of latitude, and a meridian of longitude as equivalent to a plane right triangle."" (C.B. Boyer, The History of the Calculus and its Conceptual Development, p. 152). ""In 1624 Snel published his lessons on navigation in Tiphys batavus (Tiphys was the pilot of the Argo). The work is mainly a study and tabulation of Pedro Nuñez’ so-called rhumb lines (1537), which Snel named ""loxodromes"". His consideration of a small spherical triangle bounded by a loxodrome, a parallel, and a meridian circle as a plane right triangle foreshadows the differential triangle of Pascal and later mathematicians."" (D.S.B.). Paul Helbronner (1871-1938) was a French topographer, alpinist, and geodosist, who pioneered cartography of the French Alps. Pointe Helbronner in the Mont Blanc massif is named in his honour. ‎

‎"Documents - Revue des questions allemandes - n°Spécial hiver 2001-2002 - 56e année - ""Le triangle de Weimar - France-Allemagne-Pologne Une vision partagée de l'Europe?"‎

‎Documents. 2001. In-8. Broché. Bon état, Couv. convenable, Dos satisfaisant, Intérieur frais. 128 pages.. . . . Classification Dewey : 70.49-Presse illustrée, magazines, revues‎

‎Le colloque de Berlin, le triangle de Weimar dans la nouvelle Europe - Le moteur de l'Union Européenne élargie? - Les rencontres officielles du triangle de Weimar - Réalisations et ambitions du triangle - Le triangle de Weimar en 2001 - Entre histoire et mémoire - Le sommet Franco-allemand de Nantes - Les relations franco et germano - polonaises. Classification Dewey : 70.49-Presse illustrée, magazines, revues‎

‎Geometric Figures & Color. Sol LeWitt. Circle, Square, Triangle, Rectangle, Trapezoid and Parallelogram in Red, Yellow and Blue on Red, Yellow and Blue‎

‎LeWitt, Sol: Geometric Figures & Color. Sol LeWitt. Circle, Square, Triangle, Rectangle, Trapezoid and Parallelogram in Red, Yellow and Blue on Red, Yellow and Blue. New York: Harry N. Abrams, 1979. Signed by the artist on the title page. 48 pages of illustrations. Paperback. 21 x 21cms. Lewitt conceptually explores: 'Circle, Square, Triangle, Rectangle, Trapezoid and Parallelogram in Red, Yellow and Blue on Red, Yellow and Blue.' The book is divided into three sections, each of which differ by background color. Barbara M. Reise wrote that 'LeWitt's colours, like his lines and squares, are like 'facts': they are inert, pre-established, accepted and un-emotional man-made constructs which can 'come to life' within a present context but do not necessarily do so. Red, yellow, blue, and black (and the white of wall or paper) are standard 'absolute primaries basic to all pigment colour - that is according to the colour system accepted by an art academic from early 19th-century theorists like Chevreul. Unlike the Newtonian rainbow-spectrum based on light-waves, this theoretical structure is more conceptually mathematical and tautological than referential to some exterior and inhuman Nature. LeWitt's use of these colours is as flatly complete, physical, and self-reflective as the theory itself. Unlike Seurat, whose use of the same colour theories was subordinated and interrelated to other interests in proportion theories and (seen) scene subject-matter, LeWitt uses colour as both the subject and the object of his art' (in: 'Sol Lewitt Critical Texts,' ed. Adachiara Zevi, Rome, 1994, p. 188).‎

‎Lewitt conceptually explores: 'Circle, Square, Triangle, Rectangle, Trapezoid and Parallelogram in Red, Yellow and Blue on Red, Yellow and Blue.' The book is divided into three sections, each of which differ by background color. Barbara M. Reise wrote that 'LeWitt's colours, like his lines and squares, are like 'facts': they are inert, pre-established, accepted and un-emotional man-made constructs which can 'come to life' within a present context but do not necessarily do so. Red, yellow, blue, and black (and the white of wall or paper) are standard 'absolute primaries basic to all pigment colour that is according to the colour system accepted by an art academic from early 19th-century theorists like Chevreul. Unlike the Newtonian rainbow-spectrum based on light-waves, this theoretical structure is more conceptually mathematical and tautological than referential to some exterior and inhuman Nature.. LeWitt's use of these colours is as flatly complete, physical, and self-reflective as the theory itself. Unlike Seurat, whose use of the same colour theories was subordinated and interrelated to other interests in proportion theories and (seen) scene subject-matter, LeWitt uses colour as both the subject and the object of his art' (in: 'Sol Lewitt Critical Texts,' ed. Adachiara Zevi, Rome, 1994, p. 188). Text in English‎

‎Sciences et avenir n° 651 - Eau : pollution au prison, Epidémie : sur la piste du mouton fou, Effet de serre : la revanche du climat, Les colères de l'océan, La véritable histoire du Titanic, En mer du Nord : le nouveau Triangle du diable, Triangle‎

‎Bureaux de la revue. Mai 2001. In-4. Broché. Bon état, Couv. convenable, Dos satisfaisant, Intérieur frais. 140 pages. Nombreuses illusrations en couleurs dans et hors texte.. . . . Classification Dewey : 500-SCIENCES DE LA NATURE ET MATHEMATIQUES‎

‎Sommaire Eau : pollution au prison, Epidémie : sur la piste du mouton fou, Effet de serre : la revanche du climat, Les colères de l'océan, La véritable histoire du Titanic, En mer du Nord : le nouveau Triangle du diable, Triangle des Bermudes : naissance d'un mythe Classification Dewey : 500-SCIENCES DE LA NATURE ET MATHEMATIQUES‎

‎Conan Doyle A. Circle in a Triangle. In Russian (ask us if in doubt)/Konan Doyl'‎

‎Conan Doyle A. Circle in a Triangle. In Russian (ask us if in doubt)/Konan Doyl' A. Krug v treugol'nike. Short description: In Russian (ask us if in doubt).The collection includes a cycle called The Circle in the Triangle-Brazilian Cat-Ring of Toth. The Valley of Fear or the Valley of Horror is Arthur Conan Doyle's detective novel, published in 1915. The last of Conan Doyle's four novels about Sherlock Holmes. The story is based in part on real-life events related to the activities of Molly Maguire in the Irish Secret Society. The first publication took place in Strand Magazine between September 1914 and May 1915. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalb907d860594b8ca85‎