This is a useful compendium that should find a place in all biological laboratories. The common diseases of laboratory animals are briefly mentioned, and suitable references are given for each of the diseases mentioned. Extensive tables showing the sources of supply for the different laboratory animals and also suppliers of animal feed are given. This information will save laboratory workers much time and correspondence in the search for sources of animals and special feeds. In the text is a selected list of the commonly used laboratory animals together with a bibliography of uses and experiments applicable to laboratory animals. There is a table containing the names and addresses of research organizations, the species of animals used by them, and also pertinent comments dealing with strains, weights, etc., of the different types used in these laboratories.