THE PROBLEMS attending growth of population have been frequently stressed from biological and economic standpoints. Not so often, however, has the layman or the scientist recognized the importance of increasing numbers, with consequent industrial expansion, in their effect upon the public health and welfare. As water supply resources approach closer and closer in contact with domestic and industrial waste discharges, difficulties increase in preventing and remedying potential and actual health hazards. If relief from these conditions were to be found solely in legislation, accurately drafted and courageously administered, the solution would be quite simple. But legal restriction rarely is synonymous with elimination of problem, unless an intelligent and sympathetic public opinion promotes action and stands watch over its fulfillment. At the present date, laws on these questions are varied in number and purpose and perhaps they always should be to meet varying local conditions. Administrative notions are many colored, reflected upon facets oriented by political, economic and moral forces and opinions. Technical solutions, on the contrary, stand alone as clarified. The missing motivating force is probably largely popular understanding and cooperation. Where administrative, technical and legal problems are so intertwined as in this situation, future solutions would probably result from joint consideration of each of the controlling factors. The object of the symposium which follows was to point out these interrelations, to present the complexity of the problem, to suggest solutions and to indicate trends of administrative adaptation of engineering facts. The findings well justify the attempt of the Public Health Administration and Public Health Engineering Sections. They are by no means ultimate, but they point the way to further effort. AIBEL WOLMAN
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