For the introduction to his study of the patient and the weather Petersen has gone back to the school of Cos and the writings of Hippocrates, in which great emphasis was placed on environmental influences as affecting the course of disease. The historical aspect of this subject, which has been much neglected since the advent of bacteriology, furnishes an interesting background to his study of the distribution of various diseases in the United States.
The study is based on the reports of the United States Weather Bureau for barometric pressures, humidities and temperatures and on the incidence of various diseased conditions as revealed by the United States Army draft. Regions with the greatest variations in weather show the greatest incidence of diseases of nervous instability and vascular spasm.
The book is well worth reading and full of interesting suggestions, even though one cannot go the whole way with the author