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 on 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 



