Large Collection of Mathematical Literature and Books on Calcula

1) Philosophiae Newtonianae Institutiones, in Usus Academicos, G.J. 's Gravesande, Venetiis MDCCXLIX (1749), in Latin, 571 pages plus index, 18 folded copper plates, vellum binding. - 2) The Young Gentleman's Trigonometry, Mechanicks, and Opticks, Edward Wells, Volume II, 2nd edition, London 1731, and Volume III, 4th edition, London 1736, both in leather binding. - 3) Introductio ad Philosophiam Metaphysicam et Logicam, G.J. 's Gravesande, Venetiis MDCCXXXVII (1737), in Latin, 287 pages, leather binding. - 4) Elementa geometriae planae ac solidae, nec non Selecta ex Archimede theoremata, Andrea Tacquet et Rogerii Josephi Boschovic, Patavii MDCCLXI (1761), in Latin, 327 pages, 17 folded plates, vellum binding. - 5) Facillima artis arithmeticae methodus, Das ist: Sehr leichter Unterricht und Lehrart der höchst-nothwendigen und nutzbaren Rechenkunst, 23rd edition, Augsburg 1811, Johann Baptist Lechner, 350 pages, half-leather binding. - 6) Leichtes Lehrbuch der Arithmetik, Geometrie und Trigonometrie für die ersten Anfänger, 5th edition, Gießen 1816, Friedrich Wilhelm Daniel Snell, 248 pages, half-leather binding. - 7) 15 mathematical textbooks, 19th and early 20th century. - 8) Der stumme Diener - Universal-Schnell­rechner, 7th edition, c. 1910, Remig Rees, 331 pages. - 9) Langguth's calculator "The Ladder", in original cover. - 10) Gemeinnütziger Calculator für alle im Rechnungsfache k. k. Beamten, Prague 1815, Florian Simon, 101 pages, half-leather binding. - 11) Peters neue Rechentafeln, Berlin 1909, large format. - 12) Modern books on calculating machines: "Calculus", "Versuch einer Geschichte der Rechenmaschine", "Histoire des instruments et machines à calculer", "Antique Office Machines", "Rechnen mit Maschinen", "Historische Rechenmaschinen - Arithmeum", "Universalge­schichte der Zahlen". - 13) 35 other books. - 14) 3 prints in passe-partouts. - And: 15) 8 original instruction manuals. - Books in mixed condition.

布雷克拍品等级是为了方便竞买人判断拍卖品的成色而设置的。布雷克等级用1到6级来标注外观和功能的成色，(从非常好到非常差)。 在目录图册里用括号里的2个数字来表示，前一个数字表示外观成色的级别，后一个数字表示功能成色的级别。如(3/2)表示外观成色是3(满意的)，功能成色2(好)。 成色 定义参照下列标准： 1 - 非常好 (未使用过，没有使用痕迹) 2 - 好 (新，极少的使用痕迹) 3 - 满意的 (普通的使用痕迹) 4 - 及格的 (明显的使用痕迹，某个非主要部件是后配的) 5 - 有缺陷的 (极明显的使用痕迹, 某个主要部件是后配的，功能上有缺陷，需要修理) 6 - 非常差 (严重破损, 缺少重要部件)