54 Proceedings. 



General Meeting, November 3, 1891. 



Edward Schunck, Ph.D., F.R.S., F.C.S., President, 

 in the Chair. 



Mr. Edward Halkyard, of Knutsford, and Professor 

 Arthur W. Hare, M.B., F.R.C.S.E., F.R.S.E., of the 

 Owens College, Manchester, were elected ordinary members 

 of the Society. 



Ordinary Meeting, November 3, 1891. 



Edward Schunck, Ph.D., F.R.S., F.C.S., President, 

 in the Chair. 



The thanks of the members were voted to the donors of 

 the books upon the table. 



Mr. Harry Grimshaw, F.C.S., read a paper " On the 

 Purification of Sewage." An animated discussion ensued, 

 in which Mr. S. Clement Trapp, Mr. William Thomson, 

 F.C.S., Dr. Schunck, Mr. Joseph Corbett, Mr. S. B. Wor- 

 THINGTON, and others took part. The general conclusion 

 was that the possibility of making waters, polluted by 

 sewage and industrial refuse, optically pure by means of 

 chemical precipitation was no longer a matter of doubt, 

 but that the practicableness of any of the methods pro- 

 posed must depend on cost and on the possibility of 

 disposing of the precipitated matter. Mr. Joseph Corbett 

 spoke in high terms of praise of the results already obtained 

 by the Salford Corporation in dealing with the sewage 

 pollution of the I r well. 



