THE PURIFICATION OF SEWAGE.

Being a Brief Account of the Scientific Principles of Sewage Purification, and their Practical Application. By Sidney Barwise, M.D. (Lond.), M.R.C.S., D.P.H. (Camb.), Fellow of the Sanitary Institute, Medical Officer of Health to the Derbyshire County Council. Crown 8vo, cloth.

[Just Published. 5/0

“‘What process shall we adopt to purify our sewage?’ This question has rarely been treated from so many points of view in one book. This volume teems with practical hints, which show the intimate knowledge the author has of his subject.”—The Engineer.

“We know of no book of the same size which gives so complete and accurate an account of the principles of sewage purification.”—The Builder.