102 Proceedings, &c, for 1880. 



water purification. Mr. Blackett illustrated his paper with experi- 

 ments. An interesting discussion followed, in which Mr. Patching, 

 Mr. Goldstein, and others had part. 



The next meeting of the Section took place 21st May, 1880, at 

 which Mr. C. R. Blackett submitted some analysis of the Yan Yean 

 water, and the residues thrown down by tersulphate of alumina, 

 which were subsequently brought before the Society's ordinary 

 meeting, and gave rise to a long and useful debate. 



Mr. Ellery described a process for reproducing impressions on 

 glass by means of some metallic sulphides. 



Meetings were called for June, July, and September, but lapsed 

 for want of a quorum. 



The death of the estimable Secretary (Mr. Patching) has for the 

 present suspended the business of the Section. 



C. R. BLACKETT, Chairman. 



