Reference Books
elementary
Hunter, Laboratory Problems in Civic Biology. American Book Company.
Bigelow, Introduction to Biology. The Macmillan Company.
Cornell Nature Study Leaflets. Bulletins XVI, XVII.
Davison, Practical Zoölogy, pages 185-199. American Book Company.
Hodge, Nature Study and Life, Chaps. XVI, XVII. Ginn and Company.
Sharpe, Laboratory Manual, pp. 195, 204-209. American Book Company.
advanced
Dickerson, The Frog Book. Doubleday, Page and Company.