TIIE student’s larger MICROSCOPE. 
29 
strong, made of japanned cast-iron, giving firm support and 
freedom from tremor. The coarse adjustment is performed by 
Fig. 10. 
NO. 4. STUDENT’S LARGER MICROSCOPE. 
Fifteen inches high when arranged for use. 
a rack and pinion, by turning a large milled head, conven- 
iently placed ; the body moving steadily in a long grooved sup- 
port, and being retained in any position by springs. The fine 
adjustment of the focus is performed by a screw acting upon a 
CATALOGUE OF ACHROMATIC MICROSCOPES. 
