2 French Brass Microscopes

1) Signed: "M. Stiassnie à Paris", c. 1895. 3¾-inch round base, two tubular pillars, capped with inclination joint, swiveling and gimbal-mount double mirror, substage pinhole diaphragm, square stage with 2 clips, limb with milled-head fine adjustment at the top, sliding body tube coarse adjustment, double nosepiece, 1 ocular, 2 objectives, height 11 ¾ in., in mahogany case. This compound microscope was designed by Constant Verick in 1866, his successor Maurice Stiassnie produced this model until the end of the 19th century. - And: 2) Unmarked, c. 1870, cast-iron base, two tubular pillars, capped with inclination joint, swiveling and gimbal-mount double mirror, substage pinhole diaphragm, lever-mechanical rectangular stage with 2 clips, draw tube, rack-and-pinion coarse adjustment, 3 button-type objectives are screwed one into the other, 1 ocular, tube with swiveling mounted bull's eye condenser, height 11 in.

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)