70 Proceedings. 



Mr. W. E HOYLE, M.A., exhibited Natitilus pompiliiis 

 (the Pearly Nautilus) and Notoryctes typhlops (the burrowing 

 marsupial). 



Mr. William Thomson, F.R.S.Ed., F.C.S., read a 

 paper " On the Suspended Impurities in Manchester 

 Water," relating to the separation of solid matter from the 

 water by means of a filter of fossil earth. A discussion 

 ensued, in which Professor REYNOLDS and Dr. SCHUNCK 

 took part. 



Ordinary Meeting, December 27th, 1892. 

 Charles Bailey, F.L.S.. Treasurer, in the Chair. 



The thanks of the members were voted to the donors of 

 the books upon the table. 



Reference was made to the death of Sir Richard 

 Owen, F.R.S., F.L.S., &c., &c., who was elected an honorary 

 member of the Society in 1844. 



Dr. James Bottomley, F.C.S., read a paper " On a 

 Method of Integration applicable to certain partial Differ- 

 ential Equations." 



A conversation on various simplified methods of obtain- 

 ing mathematical, and particularly arithmetical, results 

 ensued. 



