26 THE MICROSCOPE 



IV. Make the following drawings in your research notebook : 



A. A careful diagram of a group of cells five times as large as they 

 appear under low power. 



B. A group of cells twice as large as they appear under high 

 power. Label cell wall, cytoplasm, vacuole, nucleus, nucleolus. Under 

 the drawing, in small figures, state how many times enlarged your draw- 

 ing has been made ; for example, X 4 ; X 5 ; X 2. 



QUESTIONS 



1. What is the difference between a simple and a compound micro- 

 scope ? 



2. Classify the parts of a microscope into three divisions. 



3. Name two effects a microscope has on objects. 



4. Explain how to focus with the low power ; with high power. 



5. Why can we focus only thin material with our compound 

 microscopes ? 



6. How do you mount a specimen, for study under the compound 

 microscope ? 



SUPPLEMENTARY READING 



Locy, W. A., Biology and Its Makers (Henry Holt & Co.). 



Locy, W. A., The Growth of Biology (Henry Holt & Co.). 



Traeger, Alfred, The Microscope (E. Leitz Inc., 60 East 10th St., N. Y.). 



