It seems to the author that three kinds of work should be included in the elementary study of zoology. These three kinds are: (_a_) observations in the field covering the habits and behavior of animals and their relations to their physical surroundings, to plants, and to each other; (_b_) work in the laboratory, consisting of the study of animal structure by dissection and the observation of live specimens in cages and aquaria; and (_c_) work in the recitation- or lecture-room, where the significance and general application of the observed facts are considered and some of the elementary facts relating to the classification and distribution of animals are learned. These three kinds of work a…
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