§ 72. Sir C. RAWSONasked the Lord President of the Council whether he can furnish any information on the result of the investigations of the microbiology laboratory at the Rothamsted station at Harpenden with regard to the suffocation of fish owing to the discharge into rivers of the residue of fats in water in which churns and other equipment from milk factories and large dairies are cleansed?
§ The LORD PRESIDENT of the COUNCIL (Mr. Stanley Baldwin)The investi- 325 gations referred to which are being carried out at Rothamsted under the auspices of the Department of Scientific and Industrial Research as part of the programme of the Water Pollution Research Board are not yet complete though important results have been obtained. There is good reason to expect that milk effluents can be rendered innocuous by filtration methods, and the main problem remaining is to discover an economical method of geting rid of fatty film which accumulates on top of the filter bed. If my hon. Friend wishes for more detailed information I shall be happy to supply it to him direct.