REFERENCE BOOKS 31 



PROBLEM QUESTIONS 

 



1. What is meant by environment ? Give examples for a plant ; 



a canary ; a cat ; yourself. 



2. How might a given factor of the environment, as the air, be 

 changed in your home ? In a factory ? In a mine ? 



3. How might climate affect the environment? 



4. Your school is an important part of your environment. 

 What might you do to better it? 



5. What is a graph? 'Of what use is a graph? Explain. 



6. Why should every well-educated person understand graphs ? 



REFERENCE BOOKS 



Hunter, Civic Biology, Chap. II. American Book Company. 



Hunter, Elements of Biology, Chaps. II, X. American Book Company. 



Hunter, Essentials of Biology, Chaps. II, XII. American Book Company. 



Allen, Civics and Health. Ginn and Company. 



Bailey, How Plants Live Together. Cornell University Nature Study Quarterly, 



Xo. 6, October, 1900. 

 Bergen and Davis, Principles of Botany, Chaps. XXXVI, XXXVII. Ginn and 



Company. 



Caldwell and Eikenbeny, Elements of General Science. Ginn and Company. 

 Clark, An Introduction to Science. American Book Company. 

 Coulter, Textbook of Botany, Chaps. XXI, XXII, XXIII, XXIV. D. Appleton 



and Company. 

 Darwin, Different Forms of Flowers on Plants of the Same Species. D. Appleton 



and Company. 



Hessler, First Year of Science. Benj . Sanborn and Company. 

 Hough and Sedgwick, Elements of Hygiene and Sanitation. Ginn and Company. 

 Jordan and Kellogg, Animal Life. D. Appleton and Company. 

 Merriam, Life Zones and Crop Zones in the United States. U. S. Department of 



Agriculture, Bulletin 10. 



Sharpe, Laboratory Manual in Biology. American Book Company. 

 Warming, Ecology of Plants, and Introduction to the Study of Plant Communities. 



Frowde, Clarendon Press, London. 

 Weed, Wild Flower Families. J. B. Lippincott Company. 



