3 6o 



ERECT IMAGES IN DRAWINGS 



[Cn. X 



The arc lamp is of the Liliput 

 form with small right-angled car- 

 bons. 



The lamp condenser is large, 

 such as is used for lantern-slide 

 projection, hence large as well 

 as small objects can be illumi- 

 nated by it. 



For convenience in feeding the 

 carbons there is a rod extending 

 down within reach of the artist. 



The microscope and stage are 

 separate and independently 

 movable on the vertical optical 

 bench. In addition to the lamp 

 condenser there are two or more 

 substage condensers of different 

 foci. 



The object is put on the upper 

 side of the stage. 



The microscope can be used 

 with an ocular, or the draw tube 

 and ocular can be removed from 

 the large microscope tube, and 

 then objectives alone'used, thus 

 givingf very large fields. 



GER'S VERTICAL DRAWING AND PHOTOGRAPHIC 

 APPARATUS FOR USE ON THE 

 HOUSE CIRCUIT. 



(Cut loaned by Ernst Leitz). 



