MlCHICiAN ACADEMY OF SCIENCE. 41 



made to even enumerate the probable microscopic forms present in such 

 tanks. Students coming in contact with such demonstrations un- 

 consciously become familiar with these types of animals and the environ- 

 ment in which they live. An interest in living animals and their habits 

 is aroused apart from the routine of laboratory work and such an interest 

 may well serve to carry students farther along in this field of study. 



Literature cited: Bateman, G. C, 1897. Tlie Vivariuni. London, Eng. Bateman and 

 Bennett, 1890. The Book of Aquaria. London, Eng. Eggeling and Ehrenberg, 1912. Tlie 

 P'resliwater Aquarium. New Vorl<. Miall, L. C, 1895. The Natural History of Aquatic 

 Insects. London, Eng. Osburn, R. C, 1914. The Care of Home Aquaria. New York 

 Zoological Society, New York. Page, C. N., 1898. Aquaria. Des Moines, Iowa. 



