This book, by one of the most distinguished English epidemiologists of our day, will be warmly welcomed by American students, who have already had a foretaste of its quality in the three Herter lectures delivered by Greenwood at Johns Hopkins University in 1931 and published in 1932. In the present volume 134 pages is devoted to general principles and methods and the remainder to special illustrations. The statistical method of treating epidemiologic data is emphasized throughout, but most of the book can be read easily and with pleasure by one not versed in the higher mathematics.
The author is refreshingly outspoken on fundamental epidemiologic problems. "We do not really know why the rate of mortality for tuberculosis has fallen as it has; we have not the least idea why scarlet fever, deadly fifty years ago, is now a relatively trivial cause of mortality" (p. 65). "Without doubt, it is idle