Seibert #5257

The No. 4 model microscope, c.1887

Seibert #5257
The following was extract 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.


Seibert #5257. model 4 microscope

Seibert #5257. model 4 microscope

fine adjustment

Seibert #5257, The No. 4 model in case

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