IV 
PAGE 
On the Use of Graphic Representations of Chemical For- 
mula. By Dr A. Crum Brown^, . . . 429 
Donations to the Library, . . . .431 
Monday, \*lth April 1865. 
On Confocal Cones. By H. Fox Talbot, Esq., . 432 
On the Celtic Topography of Scotland. By W. F. Skene, 
Esq., ...... 432 
On the Bands produced by the Superposition of Paragenic 
Spectra formed by the Grooved Surfaces of Glass and 
Steel. Part II. By Sir David Brewster, K.H., 
F.R.S., ...... 434 
Remarks on the Flora of Otago, New Zealand. By W. 
Lauder Lindsay, M.D., F.L.S., Hon. Member of the 
Philosophical Institute of Canterbury, New Zealand, 434 
On the Composition of some Old Wines. By Douglas 
Maclagan, M.D., Curator Roy. Soc. Edin., . 437 
Preliminary Note on the Colouring Matter of Peziza 
cBTuginosa. By Dr A. Crum Brown, . . 439 
On the Motion of Interpenetrating Media. By Alfred R. 
Catton, B.A., Assistant to the Professor of Natural 
Philosophy in the University of Edinburgh, . 441 
Donations to the Library, . . . .442 
Monday, Isi May 1865. 
Some Observations on the Cuticle in relation to Evapo- 
ration. By John Davy, M.D., F.R.S. Lond. and 
Edin., ...... 443 
On Water, Hydrogen, Oxygen, and Ozone. By John 
Macvicar, D.D. Communicated by Dr E. Ronalds, 444 
On the Behaviour of Iron Filings strewn on a Vibrating 
Plate, and exposed to the action of a Magnetic Pole. 
By Professor Tait, .... 444 
On some Congenital Deformities of the Human Skull. By 
V>^M. Turner, M.B., F.R.S.E., . . .444 
On Saturated Vapours. By W. J. Macquorn Rankine, 
C.E., LL.D, F.R.SS. Lond. and Edin., &c., . 449 
On the Ganglia and Nerves of the Heart, and their con- 
nection with the Cerebro- Spinal and Sympathetic 
Systems in Mammalia. By J ames Bell Pettigrew, 
M.D., Edinburgh, Assistant in the Museum of the 
Royal College of Surgeons of England, . . 452 
Donations to the Library, .... 455 
