PLATE 16 , 



Zeiss photomicrographic stand I"^. 



The barrel "y* is of greater diameter than in stand Ila. The line 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 6ne 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 5gure 120- 



