162 



THE MICROSCOPE. 



CHAPTER III. 



RELIMINART DIRECTIONS ILLUMINATION ACCESSORY APPARATUS GILLETT'S, 



ROSS'S, BECK'S, POWELL AND LEALAND'S, AND OTHER CONDENSERS THE 



LIEBERKUHN SIDE REFLECTOR LAMP- 

 OBJECT FINDER COLLECTING STICK 

 ANIMALCULE CAGE SECTION CUTTER 

 PREPARING AND MOUNTING OBJECTS 

 DOUBLE STARRING, ETC. 



AVINGr selected an apartment 

 with a northern aspect, and, if 

 possible,with only one window, 

 and that not overshadowed by 

 trees or buildings in such a 

 room, on a firm, steady table, 

 keep your instruments and ap- 

 paratus open, and at all times 

 ready for observation. A large 

 bell-glass will be found most 

 convenient for keeping dust 

 from the microscope when set 

 up for use. In winter it will be 

 proper to slightly warm the 

 instrument before using it, 

 otherwise the perspiration from the eye will condense 

 on the eye-glass, and obscure vision. 



Management of the Microscope. Should the micro- 

 scope not have been used for some time, dust and 

 moisture will in all probability collect and settle on 

 the eye-piece. The foggy atmosphere of large towns 

 may insinuate itself into the interior of the objective. 

 In such cases, dust and moisture can only be removed 

 by gently wiping the glasses with a piece of soft, 

 well-used chamois leather. When necessary to clean 

 the eye-piece, unscrew one glass at a time and replace 

 it before removing another. The objective can only 



