i8 



ELEMENTS OF APPLIED MICROSCOPY, 



A. Base. 



B. Pillar. 



C. Arm. 



D. Tube. 



E. Collar. 



F. Objectives. 



G. Ocular. 



H. Draw-tube scale. 

 1. Draw-tube. 



Fig. 15. — ^The Microscope, 



j^' f Coarse adjustment. 



L,. Fine adjustment. 



M. Stage. 



N. Spring clips. 



O. Mirror. 



P. Mirror bar. 



Q. Substage. 



5. Diaphragm. 



