663 
of Edinburgh, Session 1871-72. 
glue ; in the other, of carefully made india-rubber tube four or 
five millimetres in thickness, of a very small uniform bore, made 
expressly for the purpose by the Edinburgh Rubber Company. 
The iron funnel-shaped receptacles are ground at the inner apex, 
so as to fit perfectly finely-ground iron tubes. By means of these 
tubes the preliminary exhaustions are made by a band pump, 
and then they are withdrawn. This device saves a separate joint. 
The barometer tubes are attached to solid T-shaped pieces of iron 
tube, and between these pieces and the main tubes each has a 
small glass bulb. Both forms work for all practical purposes as 
well as glass, and suit admirably for Erankland’s water analyses, 
and Graham’s experiments, &c. They may be procured from 
Mr Cameron, philosophical instrument maker, South Bridge, Edin- 
burgh. 
5. Professor Alexander Dickson exhibited a large series of 
abnormal cones of Pinus Pinaster which were to form the 
subject of a future communication to the Society. 
The following Gentleman was balloted for and admitted 
as a Fellow of the Society : — 
Archibald Constable, Esq. 
Monday , 4 th March 1872. 
Professor MACQUOEN BANKINE, Vice-President, 
in the Chair. 
The following Communications were read 
1. On the Connection between Chemical Constitution and 
Physiological Action — Continued. On the Physiological 
Action of the Salts of Trimethylsulphin. By Prof. Crum 
Brown and Dr Thomas B. Fraser. 
In the former parts of this investigation we studied the physio- 
logical action of the salts of a considerable number of ammonium 
