Laboratory Apparatus and Technical Instruments

1) Chromic acid element after Poggendorff, c. 1870, early galvanic element, with zinc anode and graphite cathode, height 13 in. - 2) Arc lamp, c. 1885, Siemens & Halske, no. 620, with automatic adjustment mechanism after Hefner-Alteneck. - 3) Bunsen burner, c. 1880, brass, with 2 stopcocks, height 8 ¾ in. - 4) 2 oil containers, c. 1890, for large steam engines, brass and glass, height 6 ¾ in. each. - 5) Spectral lamp NaE, c. 1955, VEB Narva, GDR, in box. - 6) Rheostat, after Wheatstone, c. 1900, Keiser & Schmidt, Berlin, with roller and wound nickel wire, on mahogany base, 6 x 6 ¼ in. - 7) Surveying instrument, W.J. Hauck, Vienna, c. 1860, brass, silvered scales, with compass and spring motor (working), probably not complete. - 8) Crank-regulated resistor, with spirals in iron frame. - 9) Metz haemocytometer, c. 1920, E. Leitz, Wetzlar, in box. - 10) Prism, on brass stand. - 11) Four accessories for electrostatic experiments, on insulating glass columns. - 12) Angled mirror, brass, height 3 in. - 13) E.J. Dent's Dipleidoscope, c. 1860, no. 230, developed by Giovanni Battista Amici, for determining noon, brass, engraved on protective cap "Dent's Meridian Instrument". - And: 14) 12 other items.

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)