61 
———— 
' Neues System zur Ubersicht der inneren Krankheiten des 
Menschen. By the same. 
Transactions of the Cambridge Philosophical Society, Vol. 
6, Part I. Presented by the Society. 
A Catalogue of the Collection of British Quadrupeds and 
Birds, in the Museum of the Cambridge Philosophical So- 
ciety. Presented by the Society. 
Discussion of the Magnetical Observations made by Cap- 
tain Back, R.N., during his late Arctic Expedition. By 
| Samuel Hunter Christie, M. A., F. R. S., &c.. Presented by 
| the Author. 
April 24. 
Rev. B. LLOYD, D.D., Provost .T. C. D., President, 
in the Chair. 
Charles Graves, Esq., F.T.C.D., and Thomas Wise, 
Esq., M. P., were elected mgmbers of the Academy. 
A paper was read by Professor Kane “ On Dumasine, a 
new Fluid Substance isomeric with Camphor.” 
This fluid is obtained in very small quantity in the dis- 
tillation of acetate of lime for preparing mesitic alcohol. It 
boils at 248°, is colourless, and of a powerful resinous smell. 
Its composition by analysis is c,,H, 0. Thus: 
eee ee ee eee 
. rugtiae | 
Cc 
Experiments. | Theory. 
Carbon, = 78,82 — 79,30 
Hydrogen, = 10,46 — 10,35 + 100,00 
Oxygen, = 10,72 — 10,35 
The specific gravity of the vapour of this liquid was 
found to be 5,204, air being 1. The theoretical density 
from the formula above given, is 5,315, and one atom forms 
