78 



THE MICROSCOPIST. 



table has been contrived (Fig. 36). The slide is placed 

 between the springs, and while rotated, a ring of varnish 

 of suitable breadth is made on the glass. 



A piece of thin glass (or even of thick glass) may be 

 perforated and cemented to the slide with marine glue by 



FIG. 



Shadbolt's Turntable for making Cement-Cells. 



the aid of heat; or vulcanite, lead, tin, gutta percha, etc., 

 may be made into a cell in a similar way as seen in Fig. 

 37. 



The perforation of thin glass may be easily performed 

 by cementing it over a hole in a brass plate, etc., with 

 marine glue, and punching it through with the end of a 



FIG. 37. 



Cell of Glass, Vulcanite, etc. 



file. The edges may then be filed to the size of the hole, 

 and the glass removed by heating the brass. Thicker 

 glass may be bored with a file by moistening it with 

 turpentine. 



Dry objects, especially if they are transparent, as dia- 

 toms, thin sections of bone, crystals, etc., may be attached 

 to the slide with Canada balsam, etc., covered with thin 



