ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



387 



attached a three-power pocket lens. The arms are of such a length 

 that each lens is brought, by rotation, over the same spot ; thus different 









powers can be applied to the same object. Fig. 97 sshows the dissecting 

 table, which is made of sheet metal and is supplied with a glass top 



8 2 D 2 



