108 



PLANT ANATOMY. 



Eye-Piece or Ocular;, 



Draw-tube. 



Collar 



Coarse Adjustment, 



Fine Adjustment, 



Nose-Piece. 



Pillar. 



Fig. 2. Compound Microscope. 



pliarmacognocist cannot do without it. 



The Compound Microscope is an opti- 

 cal instrument constructed for the pur- 

 pose of magnifying small objects, and 

 differs from the Simple Microscope in 



that it magnifies the magnification of 

 the object. Compound Microscopes may 

 be very simple in construction, consist- 

 ing of but few lenses, but the principles 

 involved are always the same. 



