Seibert #5257. The No. 4 model microscope, c.1887

Seibert #5257. The No. 4 model microscope, c.1887 Seibert #5257. The No. 4 model microscope, c.1887
Seibert #5257. The No. 4 model microscope, c.1887 fine adjustment mechanism
Seibert #5257. The No. 4 model microscope, c.1887

Extracted from "The Microscope” by Henri Van Heurck, 1893

Seibert No. 4 microscope

Microscope No. 4 (fig, 153) with an ordinary stage, can be inclined and is furnished with rapid and slow movements. Illumination is effected by a plano-concave mirror. Under the stage a system of tube diaphragms is fixed, sliding into grooves. An Abbe condenser, a triple nose-piece, ordinary objectives I. III, V., and 1/12 homogeneous immersion of N.A, 1.3, oculars I and III, the latter with micrometer test objects, glass slips, &c, are the accessories which usually accompany this instrument. Thus equipped, stand  No.  4 gives a magnification of from 30 to 1,500 diameters.

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