PARTS OF THE MICROSCOPE 25 
Stage. This deserves little attention. It may be cleaned as above 
described. 
Inclination Joint. By means of this joint the body of the micro- 
Scope may be inclined at an angle. Should the joint become so loose 
that the microscope will not remain at the desired angle, it may be 
tightened by tightening a nut. 
WH a sg f 
Sa ape 
ARM 
a le te erie 
Fic. 25.—Showing the Different Parts of a Microscope. 
Course Adjustment. This is accomplished in one of two ways: 
The sliding tube and the rack and pinion. The former is found only 
on the cheaper microscopes, and is practically out of date. In it 
the body tube is made to slide inside of a sleeve which is fastened 
to the arm of the microscope. It is very hard to keep in order, because 
the exposed surfaces of the body tube and the inside of the sleeve 
