62 THIRD-CLASS MICROSCOPES. 



if it should be desired to clear the stage for the reception of large 

 objects, the traversing apparatus may be at once detached by un- 

 screwing the pivot, which is furnished with a milled-head. This 

 instrument is furnished with a dividing set of achromatic Objectives, 



Fig. 33. 



Pillischer's Small Student's Microscope. 



giving a power of l-4th inch when complete, of 4 inch when the front 

 lens is removed, and of 1 inch when the middle lens has also been 

 taken off ; and these, as in the preceding instance, may be replaced 

 by superior objectives if desired. An additional Eye-piece, 2-inch 

 Objective, Polarizing apparatus, and other Accessories, are fur- 

 nished at a very moderate price. 



44. Murray and Heath's Student's Microscope. — Another in- 

 strument of the same general construction as the preceding (Fig, 34) 



