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Keywords: AGENCIES
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Journal Articles
Minutes of the Proceedings of the Institution of Civil Engineers (1886) 85 (1886): 197–220.
Published: 01 January 1886
... by agitation with solid particles. 3. Purification by precipitation. 4. Purification by natural agencies. I. PURIFICATBIYOFKILTRATIOS. Until the method of water-examination by gelatine-culture was devised,therewerenoavailablemeans by which the relative efficiency, for the removal of micro-organisms...

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