PROCEEDINGS OF THE SOCIETY. 
283 
so employed would bo tolerant of living or even organic substances. If, 
therefore, they could by some means use shortened wave-lengths to their 
fullest possibility, they would have accomplished something extremely 
useful. 
The President was sure all would concur in thanking Mr. Nelson 
very heartily for the very practical paper he had laid before them. 
They were, as Dr. Dallinger had said, getting to the end of their tether 
in one direction, and this being so they must endeavour to see what 
hope there was in other directions. Possibly, in the first instance they 
would have to learn to describe colours in some better terms than at 
present, and instead of speaking of red or blue they would have to 
express colours in terms equivalent to special lines of the spectrum, so 
as to be able to get something which could be referred to a certain and 
absolute standard, and in this way they might get to know the exact 
colour they were talking about. This seemed to be the first step in the 
grammar of the matter. 
The thanks of the meeting were then unanimously voted to Mr. Nelson 
for his paper. 
The President announced that there were two other papers on the 
Agenda, but as the authors were not present and the hour was so far 
advanced, they would be deferred until their next meeting. 
The following Instruments, Objects, &c., were exhibited : — 
Dr. G. M. Giles : — Deep-sea Deposits from the Bay of Bengal. 
Mr. Halford : — Mr. Marriott’s Mounting and Dissecting Stand. 
Mr. J. Hood : — Drawings of two species of Rotifers illustrating his 
note. 
Mr. J. W. Lovibond : — A Tintometer. 
Mr. G. 0. Mitchell : — Diatomaceous earth from Los Angeles. 
Mr. Nelson : — Messrs. Watson’s new form of Edinburgh Student’s 
Stand : — New form of Mechanical Draw-tube. 
Dr. H. G. Piffard : — Photographs and Photomicrographs illustrating 
his letter. 
Mr. T. F. Smith : — Photomicrographs illustrating his note. 
New Fellows: — The following was elected an Ordinary Fellow: — 
Mr. Martin Kidley Smith. 
Meeting of 15th March, 1893, at 20 Hanover Square, W., 
The President (A. D. Michael, Esq., F.L.S.) in the Chair. 
The Minutes of the meeting of 15th February last were read and 
confirmed, and were signed by the President. 
The List of Donations (exclusive of exchanges and reprints) received 
since the last meeting was submitted, and the thanks of the Society were 
given to the donors. 
From 
Report of the British Association, 1892 Mr. F. Crisp. 
Microscopical Fauna of the Cretaceous of Minnesota. 4to., 1893 Mr. B. W. Thomas. 
