ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



613 



Seibert's No. 8 Microscope. — The Micro- 

 scope No. 8 in Seibert and Kraft's Catalogue 

 (fig. 95) has a fine adjustment similar in 

 principle to those described Vol. III. (1880) 

 p. 882, though carried out in a different man- 

 ner. Here the stage is suj)ported on a horse- 

 shoe-shaped frame, and is pivoted to one of 

 the projecting arms. A screw passing through 

 the opposite arm raises the stage at the end 

 and as the screw is withdrawn a spiral spring 

 presses the stage back again. 



Reichert's Large Dissecting Microscope 

 and Hand Magnifiers.— C. Keichert's large 

 dissecting Microscope (fig. 96) is of excep- 

 tional size for the examination of sections of 

 brain and similar large objects. The stage 

 is entirely of glass, and is 11*5 cm. wide and 

 18 cm. long. The mirror can be moved for- 

 wards and to both sides. The preparation is 

 intended to be fixed while the lens is capable 

 of being moved over it in all directions. The 

 arm a b can be rotated on a, and the lens- 

 carrier c d can also be rotated at b. By turning 

 the milled head c the inner tube d which carries 

 the lens is pushed forward or withdrawn again. 



Fig. 9G 



Fig. 95. 



