The bacteriological examination of water supplies.

Date:
1934
Catalogue details

Licence: Public Domain Mark

Credit: The bacteriological examination of water supplies. Source: Wellcome Collection.

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    No novel procedure is recommended, nor is any new body of obser- vations brought forward. Indeed, several procedures already proposed or used by workers at home and abroad have not been mentioned, since, as yet, they cannot be regarded as part of generally accepted doctrine. Furthermore, the standards of purity, in terms of bacteriological control, suggested in Section VI. of the Memorandum, are put forward with due reserve. It may not be found practicable to attain them with some water supplies which, nevertheless, may justly be passed as satisfactory. Or it may be found that the limits suggested as permissible should be made more stringent and that water supplies just coming within those limits should be subjected to further processes of purification till they reach a higher degree of quality. Special attention is drawn to the importance of correlating exact topographical conditions with bacteriological findings, and to the fallacy, not indeed current among bacteriologists themselves, of drawing final conclusions from a single bacteriological examina- tion of any water. In brief, the Memorandum may be regarded as correlating tests of which many modifications are at present current, and as suggest- ing standards for a routine in water examinations, thus contributing to a greater degree of unanimity of opinion on the hygienic quality of any of our diverse water supplies. _ I have the honour to be, Sir, Your obedient Servant, GEORGE NEWMAN. Whitehall, March, 1934.
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