CH. X] 



TROUBLES IN DRAWING 



385 



FIG. 218. THE ZEISS PHOTO-MICROGRAPHIC MICROSCOPE. 



(From Zeiss' Catalogue). 



This is the parent form of photo-micrographic stands with large tube (J 1 ), 

 handle in the pillar and a special fine adjustment at the side (W). At the top 

 is half of the light-excluding sleeve. 



