416 HISTOLOGY. 



Within the past ten years the cost of a good instrument has been so reduced 



Eye-piece (Ocular) 



Tube 



Draw-tube 



Eack and 'pinion adjustment 



Triple revolver 

 Objective 



Micrometer Screw 



Mirror 



that an increasing proportion of students can enjoy the advantage of having 

 a microscope of their own. 



