272 



USE OF THE MICROSCOPE 



it by the pillar below the stage, never by the arm or fine adjust- 

 ment pillar, since the fine adjustment bearings might be injured 

 in that way. Take a position near a window where the light 

 from the sky will be unobstructed, but where direct sunlight 

 will not fall upon the microscope. A north window is prefer- 

 able where the too bright light from the sun cannot interfere 

 with good vision. Place the microscope oh the table, as shown 



Fig. 148. — Showing correct position at the compound microscope. 



in Fig. 148, so that with the microscope erect you can look into 

 the eyepiece without putting yourself in a constrained position. 

 The better microscopes have an inclination joint, so that the 

 microscope can be inclined to suit the height of the observer; 

 but since in histological work fluid reagents and mounting 

 media are to be used it is better to keep the microscope upright 



