3 APRIL 1915, Page 23

A useful set of volumes known as "The Cambridge Public

Health Series " are being issued by the Cambridge University Press under the general editorship of Dr. G. S. Graham-Smith and Mr. J. E. Purvis. A new addition to the series is a study of Sewage Purification and Disposal by G. Bertram Kershaw (12e. net), which should be of much service to sanitary engineers and public health officers generally.