The tenth annual report of the director of the Bureau of Science of the Philippines gives an account of the work of the bureau during the year ending August, 1911. The work mainly concerns the biologic sciences and chemistry, and only indirectly refers to medicine. Investigations with regard to yaws, particularly with reference to the action of salvarsan, are noted. The opinion is expressed that the preparation is as important a specific for yaws as quinin is for malaria. Work on the parasitic amebas and on various worms, as well as investigations on leprosy, cholera, dystentory and rabies, is reported.