96 



THE MICROSCOPE. 



cross-bar (A) of which is a groove, in order that the ob- 

 server may enjoy the luxury of applying a MaltwoooYs 

 finder, as in larger instruments possessing moveable stages. 



Fig. bQ.Collins's Binocular Microscope. 



Beneath the stage is seen the polariser (p), fitted into the 

 circular diaphragm. The double mirror (m) possesses a 

 triple joint, so that it can be applied obliquely in ail 

 directions. 



Collins's Student five-guinea Binocular Microscope con- 

 sists of two eye-pieces, rack adjustment, top-sliding stage, 

 wheel of diaphragms, concave mirrors with adjustments 

 axes for inclining to any angle, tweezers and glass plate, 

 1 in. and J in. achromatic objectives, C series. Packed 



