84: 



Schmidt & Haensch, Berlin S. 



. Equipment similar to that of a (Fig. 22). This bench is shown at. 

 the German Exhibition. 



o 



Fig. 22. 



c) Optical bench specially designed for microscopic pro- 

 jection. It consists of a short bench mounted upon wood base with 

 two slide blocks, one of which is fitted with stage for absorption, 

 vessels (light filters) etc., the other forming a suitable support for a 

 complete microscope. 



Fig. 23. 



The latter consists of a rotating mechanical stage, a condenser 

 fitted with rack and pinion movement and a sleeve for objective tubes 

 adjustable by a micrometer screw. 



