LABORATORY METHODS OF HIS- 

 TOLOGY AND BACTERIOLOGY. 



CHAPTER L 



THE MICROSCOPE AND ITS ACCESSORIES. 



The microscope is an instrument which magnifies an 

 object by means of its optic apparatus. There are two 

 kinds of microscopes, the simple and compound. The 

 compound is used in Histology and Bacteriology. The 

 parts and use of the same will be taught from time to 

 time in the Laboratory. The base is the part that 

 rests upon the table and supports all the rest of the 

 instrument. The pillar is the perpendicular part ex- 

 tending from the base to the back part of the stage. 

 The arm is the part that is attached to the pillar and 

 works on a hinge- joint. The mirror is attached to 

 the arm in front and works by means of a universal 

 joint; its function is to give light to tn,e observer 

 while examining the object. The stage is the plat- 

 form upon which the object rests while it is being ex- 



(i-i) 



