96 



THE MICROSCOPE. 



contact by a strong wire ring. A piece of velvet 

 cemented to the under sur- 

 face renders the stage move- 

 ments extremely smooth and 

 easy. The mirror, E, besides 

 swinging in a rotating semi- 

 circle, will slide up or down 

 the tube, H, or it will turn on 

 either side for oblique illumi- 

 nation. 

 Beck's "Ideal" Microscope. In this excellent and 



novel instrument (shown as a monocular in fig. 50) 



. 51. Beck's Double Nose-piece. 



FIG. 52. Baker's Student's Microscope. 



the stage is of very thin and stiff brass, with a large 



