PLATE 16. 
Zeiss photomicrographic stand I¢. 
The barrel ‘“*T"’ is of greater diameter than in stand Ila. The fine adjustment is at ““ W" and no 
weight rests on it in lifting the instrument by the handle ““H."" The set screw ‘*K "* locks the upper 
part of the instrument at any angle. The objective is set in place by means of a very convenient slide 
carrier. The fine adjustment screw has an extremely slow movement ; and the vernier screws are on 
the same axis (a great convenience). The stage rotates and may be locked at the desired place by 
means of a set screw. For the substage arrangement see figure 120. 
