MEDIUM CONTINENTAL, THREE-FIFTHS ACTUAL SIZE. 



Bausch and Lomb Optical Company. 



A, base or foot; B, pillar; C, arm, in it the spring for the fine adjustment; D, body; 

 E, objective; F, draw-tube; G, eye-piece or ocular; H, mirror; I, sub-stage condenser; J, 

 stage; K, slide; L, fine adjustment; M, coarse adjustment. 



