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up to the present time, though he acknowledges that the population of the world has more than doubled in the last hundred years. He discusses various factors which have interfered with what Malthus predicted, pointing out the changed trend of population seen in Western European countries and America, and believes that it is due to widespread use of contraceptive measures. The book as a whole shows the distinguished author at his best. Few living men have been so closely in touch with the growth of public health, especially in England, but also in other countries, and none have used their opportunities to better advantage. Perhaps the most striking feature of the book is the high moral standards which are inculcated, on which everything else seems to depend. He believes strongly in education, holding that the best educator is the man who waits on and aids the development of the human mind, and that our "basic need is to train the behavior of the individual in the varying circumstances of life," the lack of such training being responsible for the continuance of a vast amount of preventable disease. The printing and make-up of the book are exceptionally good. The paper used is of the light weight so generally found in English books, and so often not found in those of American origin. M. P. RAVENEL To Whom It May Concern: A Popular Address About Smallpox and Vaccination-By William Wanklyn. London: The Voluntary Service Fund. 1927. Price 1/6. The Case Against VaccinationBy Councillor W. Asbury. London: Journal of the Royal Sanitary Institute. Vol. XLVIII, No. 4, 1927. From deep convictions growing out of many years of field experience with smallpox, both as physician and as special consultant for the London and other Boiler Feed Water PurificationBy S. T. Powell. New York: McGrawHill. 1927. 363 pp. Price, $4.00. The purification of water for industrial purposes is largely a problem for the factory although several cities in this country have municipal softening plants in operation. Water softening is also practiced in homes located in hard water regions. The discussions in this book deal with all phases of the problems involved, such as chemical coagulation, filtration, various methods of softening, distillation, the use of boiler compounds, prevention of foaming and priming and of corrosion and the use of feed water heaters. Methods for the analysis of boiler waters are given in detail. JOHN F. NORTON
American Journal of Public Health – American Public Health Association
Published: May 1, 1928
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