THE MICROSCOPE IN SECTION. 



1. Compensation ocular x 12 ; it is a positive ocular. 



2. Draw-tube, by which the tube is lengthened or shortened. 



^. Main tube or body, to the lower end of which the objective or re- 

 volving nose-piece is attached. 



4. Society screw in the lower end of the draw-tube. 

 5- Society screw in the lower end of the tube. 



6. Objective in position. 



7. Stage under which is the substage with the sub-stage condenser. 



5. Spring clip for holding the specimen. 



9. Screw for centering, and handle of the iris diaphragm in the achro- 



matic condenser. 



10. Iris diaphragm out-side the principal focus of the condenser for use 



in centering. 



11. Mirror with plane and concave faces. 



12. Horse-shoe base. 



i,^. Rack and pinniou for the sub-stage condenser. 



14. Flexible pillar 



15. Part of pillar with spiral spring of fine adjustment. 



16. Screw of fine-adjustment. 



17. Milled head of coarse adjustment. 



[From Cage's "The Microscope and Microscopical Methods."! 



