398 
Volumes corrected 
at 0° C. and 760 m.m. pressure. 
Cubic centimeters. 
Hydrogen + vapour, 406*43 
weighing 0.1695 
„ 0*0306 
Grm. 
Hydrogen, 341*27 
65*16 
01389 
Therefore, 65*16 cub. c. of alcohol vapour weigh *1389 grm. 
but 65*16 cub. c. of air weigh *0843 grm. 
Vapour density of alcohol = — =1*648 
*0843 
The authors have extended their experiments to acetic acid and 
other substances. At low temperatures the vapour-density of 
acetic acid approximates to 4*00, no matter how much hydrogen be 
employed. At higher temperatures, an approximation to 2*00 is 
obtained, but without heating so high as Cahours found necessary. 
The authors are continuing these researches. 
2. Memoir of Sir Thomas Makdougall Brisbane. By Alex- 
ander Bryson. 
The following Donations were laid on the Table 
Journal of Proceedings of the Linnean Society— Supplement to 
Vol. V. — Botany. 8vo. — From the Society. 
Bulletin de la Societe des Sciences Naturelles de Neuchatel. Tome, 
V., Pt. 2. 1860. 8 vo. — From the Society. 
Quarterly Beport of the Meteorological Society of Scotland, for the 
quarter ending 30th September 1860. — From the Society. 
Monthly Notices of the Royal Astronomical Society. Vol. XXT. 
No. 2. — From the Society. 
Proceedings of the Royal Society of London, Vol. XI., No. 42. 
8vo. — From the Society. 
Comptes Rendus Hebdomadaires des Seances de 1’ Academic des 
Sciences. Tome LII., No. 1, — From the Academy. 
Monthly Return of Births, Deaths, and Marriages in Scotland. 
December 1860. — From the Registrar-General. 
Catalogue of the Edinburgh Medical Society’s Library. 2 vols., 
1837 and 1845. 8vo. — From the Society. 
