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SECOND EDITION including A NEW CHAPTER SEWAGE PURIFICATION & DISPOSAL By G. BERTRAM KERSHAW, M.Inst.C.E. Demy 8vo With 59 illustrations 18s. net CAMBRIDGE PUBLIC HEALTH SERIES When this book was first written in 1915, the activated sludge process of sewage treatment was in its infancy, and only the work of Dr Fowler was available. Since then much work has been done in connection with this process by various experimenters, both at home and abroad, and to bring the second edition up to date, a fresh chapter has been added, dealing with this method of treatment, together with other subjects—e.g. sludge digestion. Fetter Lane CAMBRIDGE UNIVERSITY PRESS London, E.C. 4

Subscription in India and abroad Rupees 16 per annum. Post free. Payable in advance THE INDIAN JOURNAL OF MEDICAL RESEARCH Edited by THE DIRECTOR-GENERAL, INDIAN MEDICAL SERVICE, THE PUBLIC HEALTH COM- MISSIONER WITH THE GOVERNMENT OF INDIA, and THE DIRECTOR, CENTRAL RESEARCH INSTITUTE, in collaboration with LEADING AUTHORITIES ON TROPICAL MEDICINE. The Indian Journal of Medical Research is published quarterly. Each number contains about 200 pages and is illustrated with Plates in Colour and Half-tone and with Diagrams and Charts, and is the only medium publishing the results of the best medical research work being carried on by leading scientific medical men in India and the East.

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Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.226, on 02 Oct 2021 at 21:27:18, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0022172400008615 Subscription in India and abroad Rupees 16 per annum. Post free. Payable in advance THE INDIAN JOURNAL OF MEDICAL RESEARCH Edited by THE DIRECTOR-GENERAL, INDIAN MEDICAL SERVICE, THE PUBLIC HEALTH COM- MISSIONER WITH THE GOVERNMENT OF INDIA, and THE DIRECTOR, CENTRAL RESEARCH INSTITUTE, in collaboration with LEADING AUTHORITIES ON TROPICAL MEDICINE. The Indian Journal of Medical Research is published quarterly. Each number contains about 200 pages and is illustrated with Plates in Colour and Half-tone and with Diagrams and Charts, and is the only medium publishing the results of the best medical research work being carried on by leading scientific medical men in India and the East.

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INFANT MORTALITY. By HUGH T. ASHBY, M.D., M.R.C.P. Second Edition. With 9 illustrations. 15s. net. POST-MORTEM METHODS. By J. MARTIN BEATTIE, M.D. With 8 plates and 3 text-figures. 15s. net. THE CAUSES OF TUBERCULOSIS By Louis COBBETT, M.D., F.R.C.S. With 23 plates and 8 diagrams. 26$. net. FLIES IN RELATION TO DISEASE, NON-BLOODSUCKING FLIES. By G. S. GRAHAM- SMITH, M.D., F.R.s. (Out of print.) FLIES IN RELATION TO DISEASE, BLOODSUCKING FLIES. By EDWARD HINDLE, PH.D. With 88 text-figures. 18s. net SEWAGE PURIFICATION AND DISPOSAL. By G. B. KERSHAW, M.INST.C.E. Second Edition. With 56 illustrations. 18s. net. OCCUPATIONS FROM THE SOCIAL, HYGIENIC, AND MEDICAL POINTS OF VIEW. By SIR THOMAS OLIVER, M.D., D.SC, F.R.CP. 8S. 6rf. net. ISOLATION HOSPITALS. By H. E. PARSONS, M.D., D.P.H. Second Edition. Revised and partly re-written by R. BRUCE Low, C.B., M.D., D.P.H. With 55 text- figures. 25s. net. THE CHEMICAL EXAMINATION OF WATER, SEWAGE, FOODS, AND OTHER SUBSTANCES. By J.E.PURVIS, andi. H. HODGSON. Second Edition. 20*. net. THE BACTERIOLOGICAL EXAMINATION OF FOOD AND WATER. fiyW.G. SAVAGE, B.SC.,M.D.,D.P.H. Second Edition. With 16 illustrations. 15i.net. FOOD POISONING AND FOOD INFECTIONS. By W. G. SAVAGE. 17i.6rf.net. CANNED FOODS IN RELATION TO HEALTH. By W. G. SAVAGE. 85.6rf.net.

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Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.226, on 02 Oct 2021 at 21:27:18, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0022172400008615 CONTENTS (All rights reserved) F1OI WILSON, W. JAMES and BLAIR, E. MAUD MCV. Correlation of the Sulphite Reduction Test with other Tests in the Bacteriological Examination of Water. (With Plate I) Ill HICKLING, R. A. The Significance of Haemic Plasma Cells in various Infective Conditions 120 BEATTIE, J. MARTIN and LEWIS, F. C. The Electric Current (apart from the Heat Generated). A Bateriologieal Agent in the Steriliza- tion of Milk and other Fluids. (With 2 Text-figures) . . . 123 ELTON, C. S. Plague and the Regulation of Numbers in Wild Mammals. (With 4 Text-figures) 138 Hiscox, E. R. and STARLING, URSULA. The Use of the Fermentation- U.-ductaseTest for the Grading of Milk 164 MACKIE, T. J. Non-Specific Stimulation of a Natural Antibody . . 176 HILL, A. B. A Physiological and Economic Study of the Diets of Workers in Rural Areas as compared with those of Workers Resi- dent in Urban Districts. (With 8 Charts) 189

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