In spite of dealing mainly with statistics, this volume is surprisingly readable and is a valuable book of reference. It is a review of the mortality among holders of the industrial policies of a large insurance company during the twenty-five years from 1911 to 1935. The authors state that no other data concerning the mortality of such a large group of insured persons over such a length of time exist. In 1935 there were 17,000,000 policy holders. The book is written for health officers, physicians, sociologists, life insurance officials and others interested in the health of wage earners.
An interesting chapter is devoted to the progress in health during a quarter of a century, and another chapter discusses the trend of longevity during this period. In a discussion of various diseases or accidents which cause death, statistics are given concerning age, sex, color and the trend of mortality.