DURING recent years, the problems of treat-ment and disposal of the waste waters from the milk industry have increased in importance with the development of the industry in England and the establishment of depots and factories each receiving milk from many farms. Serious pollution of rivers and streams and difficulties at sewage disposal works in many parts of the country have been caused by discharges of waste waters from milk collecting and distributing depots and from factories making cheese, butter, condensed milk and other milk products. About four years ago, an investigation of the various problems was begun by the Water Pollution Research Board of the Department of Scientific and Industrial Research. Though the investigation has not yet been completed, it has already provided results of considerable practical value. It is the purpose of this article to give a brief description of those results.
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