Hornaday, Our Vanishing Wild Life. New York Zoölogical 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.