Handbuch der pathogenen Mikroorganismen.

This issue, devoted as it is to diseases of the lower animals and of plants, contains nevertheless much material of great interest to human medicine. Zurukzoglu discusses in a clear and well documented article the relation of the various animal "poxes" to one another and to human smallpox. The close relationship, if not identity, of fowlpox with the mammalian disease is strongly emphasized by the author. The poxlike diseases of fish and other cold-blooded animals are, on the other hand, regarded as of a different class. Zwick, who writes on "equine influenza," does not take any more seriously than do most recent investigators the scattered statements and conjectures that this disease is identical with human influenza. Many readers will wish that Gerlach had given a less perfunctory discussion than he does of the more important spontaneous infections of the animals commonly used for experimental purposes. The chapter on infectious diseases