BIOLOGICAL RELATIONS OF AQUATIC FORMS 199 



References 



Hunter, Essentials of Biology. Chap. XXII. 



, Elements of Biology. Chap. XXII. 



Bigelow, "Visiting a Fish Hatchery." Guide to Nature, December, 

 1908. (Stamford, Conn.) 



Smith, "The United States Bureau of Fisheries." Pub. by Inter- 

 national Fisheries Congress, Washington, D.C., 1908. 



Wieland, Geo., "Conservation of the Marine Vertebrates." Popular 

 Science Monthly, May, 1908. 



Stevenson, C. H., " Preservation of the Fisheries on the High Seas." 

 Popular Science Monthly, April, 1910. 



Butler, ' ' Codfish its Place in American History." Transactions Wis- 

 consin Academy of Science, Vol. IX, p. 261, 1898. 



Holder and Jordan, D. S., Fish Stories, American Nature Series. 



Reed, H. D., The Study of Fishes. Cornell University Nature Study 

 Quarterly, No. 8, January, 1901. 



Smith, H. M., "The French Sardine Industry." Bulletin II. S. Fish 

 Commission, 1901. 



PROBLEM XXXV (Optional) 



A study of some of tine relations of fishes to their food, 

 supply. 



a. Land Plants 



Observations. 1. What have we learned maybe in solution in soil 

 water ? 



2. Name some plants that get their mineral matter from the soil. 



3. What else have we learned plants use as food matter? 



4. What are plants able to do with the raw materials they obtain from 

 the air, with the aid of chlorophyll and sunlight ? What is the name of 

 this process ? 



Conclusions. 1. What food materials may be furnished animals by 

 plants ? 



2. What changes in the composition of the air brought about by 

 photosynthesis in plants ? 



b. Water Plants 



Observations. 1. Are the salts found in soil water also likely to be 

 found in the waters of ponds, rivers, and oceans ? 



