138 Proceedings. 



Ordinary Meeting, January 26th, 1892. 



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. 



The congratulations of the members were presented to 

 the President on the jubilee of his connection with the 

 Society, Dr. SCHUNCK having been elected a member on 

 January 25th, 1842. Mr. CHARLES B.VILEY remarked 

 that it was pleasant to find a member who began his work 

 for the Society very soon after his election half a century 

 ago as one of its secretaries still manifesting his interest in 

 it in the presidential chair ; and Dr. SCHUNCK replied that 

 his association with the Society had been throughout one 

 of the chief pleasures of his life. 



Mr. Gwyther referred to the death of the Society's 

 honorary member, John Couch Adams, F.R.S., elected 

 in 1847, who shared with Leverrier the distinction of 

 predicting, in 1845, the place where the then undiscovered 

 planet Neptune would be found, and pointed out that 

 Adam's calculations were so accurate that Professor Challis, 

 of the Cambridge Observatory, searching for the planet 

 under Adam's instructions, without the aid of the German 

 star maps, actually saw the planet twice in the place 

 predicted six weeks before the Berlin telescope was 

 directed to the sky by Dr. Galle to look for it according 

 to the indication of Leverrier. 



Mr. GWYTHER read a paper entitled " On an intrinsic 

 differential equation of conies, and its relation to the 

 invariants," showing the method of deriving the ordinary 



