Aquarium Cultures for Biological Teaching

Abstract

THE increase in the number of students in biology during the last few years has created a demand for large quantities of such animal types as Amœba, Actinosphærium, brown Hydra, and Daphnia. It is often very difficult to obtain to time vast numbers of these types; for in Nature the supply is exceedingly precarious, depending as it does on conditions which are constantly fluctuating. In endeavouring to secure a continuous and plentiful supply of Amoeba proteus, I have accumulated a certain amount of experience in aquarium-keeping on a large scale, the results of which will be useful to others who, like myself, have to deal with large numbers of students.