This book is described in its subtitle as "a handbook for the public health laboratory." As such it does not seem adapted to fill any long-felt want of American workers. Considerable space is devoted to elementary physical and chemical data. In the chapter on air analysis, for example, we are told that there are three thermometric scales in use and what the respective freezing points and boiling points are. It has been thought necessary to take up space with pictures of a hot-air oven (p. 12) and a chemical balance (p. 15). In general the methods seem somewhat perfunctorily described; this is particularly true on the bacteriologic side. Loose statements are noticed here and there. On p. 150, in the section on pathogenic organisms in milk, it is asserted that "unless the disease (tuberculosis) affects the udder, no bacilli are found in the milk."