INVERTEBRATA, CRYPTOGAMIA, MICROSCOPY, ETC. 



1079 



They can also be clamped in any position by the milled head shown 

 behind the limb. 



The stage (with revolving concentric movement) is adjustable to 

 the axis, measures 3 5 inches in diameter, and is 3^ inches above the 



Fio. 142. 



tiibhi. Wliuu iiol rcMiuircd to revulvc, it can hv chiiiipfd in any 

 jJOfiition by the milled head shown in front. When there is any 

 daiig(!r of injuring the stage by the use of acids, it can be lifted out of 

 the ring in which it revolves, and an ordinary piece of glass used on 



