70 



NOTE OX SOME PORTABLE MICROSCOPES. 



time, in so far as in it the case forms the base for the stand, to 

 which it is attached by a fly nut. Inclination is obtained by 

 opening the hd, which is held in position by catches. As will be 

 seen in the figure the coarse adjustment is by sliding tube, and 



Fig. 3. 



the fine is by micrometer screw acting on a vee slide in the pillar. 

 The main tube has a draw, and the whole is arranged to pack 

 within the case without detachiuor any of the accessories. A 

 substage, focussing by screw, to take an Abbe condenser, as shown 

 in the illustration, is attached to a side plate, which slips into a 

 corresponding recess on the under side of the main stage. 



