ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



643 



and on its upper side protected, micrometer movement, with lateral action. 

 The object-stage (110 mm. diameter) is circular and rotatory, and has 



centring screws. 



The instrument is fitted with Abbe's illuminating 



REICHERT,WIEN. 



Fig. 144. 



apparatus, with iris-diaphragm, and rack-and-pinion for raising and 

 lowering the illuminating apparatus. The tilting is regulated and clamped 

 by a lever. 



2 u 2 



