6 
STUDIES FOR MICROSCOPIC PRACTICE— 
1. Diatoms. 
2. Algae. 
3. Protozoa. 
4. Starch bodies. 
5. Vegetable cells. 
6. Cotton fibers. 
7. Linen fibers. 
8. Silk fibers. 
9. Feathers. 
10. Hair of man and of lower animals. 
11. Scales of butterflies and of other insects. 
12. Milk. 
13. Air bubbles. 
14. Oil drops. 
15. Vinegar eels {Anguillula aceti). 
16. Tube casts. 
17. Ciliated epithelium. 
18. Crystals of sugar, salt, uric acid, cholesterin, hematin, and various chemicals. 
19. Decomposing meat. 
20. Hay infusion. 
21. Surface waters. 
