CH. IX] PROJECTION MICROSCOPES ON THE MARKET 



FIG. 176. MODEL 8 DELINEASCOPE SHOWING THE POSITION OF THE 

 MICROSCOPIC ATTACHMENT FOR VERTICAL AND FOR HORIZONTAL 



OBJECTS. 



(Cut loaned by the Spencer Lens Co.). 



This projection microscopic attachment is designed to use with or without 

 oculars or amplifiers, and for microscopic objectives of all foci from 125 

 mm. to the highest available. The substage condenser consists of several 

 lenses which are easily turned in place or out of position. By making a suitable 

 combination any object and any objective can be used. To enable the opera- 

 tor to get the object in the right position in the cone of light there is a rack and 

 pinion movement moving microscope and stage toward or from the condenser. 

 Th ; s is done by the lower milled head shown. The upper milled head is for 

 the usual coarse adjustment and a micrometer screw is present for the fine 

 adjustment (see also fig. 177). 



