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PRACTICAL PHOTO-MICROGRAPHY 



and founded on principles which differ somewhat from 

 those already described, is the photo-micrographic camera of 



Messrs. Zeiss (Figs. 45 and 46). This is of the second type 

 already mentioned in which the support for the whole of the 

 optical arrangement is separated from the camera and its sup- 

 port ; there are, therefore, two separate pieces of apparatus. 



