THE ECONOMIC IMPORTANCE OF ANIMALS 231 



vances, their numbers are slowly but surely decreasing so that as 

 important factors in man's welfare they may be considered almost 

 negligible. 



REFERENCE BOOKS 

 ELEMENTARY 



Hunter, Laboratory Problems in Civic Biology. American Book Company. 



Beebe, The Bird. Henry Holt and Company. 



Bigelow, Applied Biology. Macmillan and Company 



Davison, Practical Zoology. American Book Company. 



Herrick, Household Insects and Methods of Control. Cornell Reading Courses. 



Hornaday, Our Vanishing Wild Life. New York Zoological Society. 



Hodge, Nature Study and Life. Ginn and Company. 



Kipling, Captains Courageous. ' Charles Scribner's Sons. 



Sharpe, Laboratory Manual, pp. 157-158, 182-203, 320-341. American Book 



Company. 



Stone and Cram, American Animals. Doubleday, Page and Company. 

 Toothaker, Commercial Raw Materials. Ginn and Company. 



ADVANCED 



Flower, The Horse. D. Appleton and Company. 



Hornaday, The American Natural History. Macmillan and Company. 



Jordan, Fishes. Henry Holt and Company. 



Jordan and Evermann, American Food and Game Fishes. Doubleday, Page and 



Company. 

 Schaler, Domesticated Animals, their Relations to Man and to His Advancement in 



Civilization. Charles Scribner's Sons. 



