urate demon-stration of cells and cell structure the microscope itself must U used.As a general statement concerning the use of the projection micro-scope for demonstration purposes, it may be said that it is entirelysatisfactory for objects and details which show under the microscopewith… … Fig. 159. Slide of several sections with a black mask. The mask is per-forated over the sections to be demonstrated with the microscope or the fjection tnicroscope. It is put on the hack of the slide and not on the coiglass. Unless one has a mash something like this the light is m> dazzling that…
Microscopy
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