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Ordinary Meeting, March 22nd, 1887. 
Professor Osborne Reynolds, LL.D., F.R.S., 
Vice-President, in the Chair. 
Mr. A. Brothers, F.R.A.S., read a portion of a letter from 
Mr. Arthur W. Waters, dated from Davos Dorfli, in which 
was inclosed a series of photographs of snow crystals. Mr. 
Waters says : “ My main object in writing is to send you 
some photographs of snow crystals. I have only had the 
opportunity of trying this on two occasions, and did not 
hit off the exposure in these experimental trials. It is very 
difficult, as everything must be done with great rapidity, and 
there should be an assistant, so that no seconds may be lost, 
seeing that the crystals are always changing, and you are 
likely to get them melting on the stage. Of course much 
better results might be obtained, but working in the cold 
(23° F.) with the snow falling in the apparatus, makes it 
very trying work, as it is often some time before an isolated 
crystal can be caught on the slide ; and if there is any 
clumsiness this may be lost, if it remains too long exposed 
to the reflector.” 
“A Perfect Standard of Value : considered from a scientific 
stand-point,” by F. J. Faraday, F.L.S., F.S.S. 
It has appeared to me during the recent discussions on 
the currency question that too little attention has been paid 
to the scientific aspect of the problem. It has been too 
Proceedings — Lit. & Phil. Soc,— Vol, XXVI. — No. 10, — Session 1886-7. 
