CONTENTS. Hi 
Art. XX V. Account of a new Portable Gas Lamp;, invented by 
David Gordon^ Esq. Edinburgh, - STS 
XXVI. Notice of the Progress of Botanical Science in Ben- 
gal, being the substance of a Letter from Dr 
Wallich, Superintendant of the Botanical Gar- 
den near Calcutta, to Francis Hamilton, M. D. 
F. R.S. &c, - - 376 
XXVII. Notice respecting Barystrontianite, a New Mine- 
ral found at Stromness in Orkney. By Tho- 
mas Stewart Traill, M. D. - 380 
XXVIII. Account of a singularly Poisonous Insect which 
destroys Horses. By the Rev. Elias Cornelius, 381 
XXIX. On the Phosphorescence of Minerals. By David 
Brewster, LL. D. F. R. S. &c. - S8S 
XXX. Account of the new Binary Galvanic Pile, invented 
by M. Zamboni, - - 388 
XXXI. Account of a remarkable Comet which has return- 
ed to our system in 1786, 1795, 1801, 1805, and 
18ii, - - 390 
XXXII. Notice respecting the Discovery of the Skeleton of 
a Whale on the estate of Airthrey, near Stirling. 
By Robert Bald, Esq. F. R. S. E. &c. 3^3 
XXXIII. Additional Facts relative to the Hyposulphurous 
Acid. By J. F. W. Herschel, Esq. F. R. S. &c. 396 
XXXIV. Account of the large Comet of 181 9, - 401 
XXXV. Quarterly Abstract of the Diurnal Variation of the 
Magnetic Needle. By Colonel Beaufoy, F.R.S. 403 
XXXVI. Proceedings of the Royal Society of Edinburgh, 404 
XXXVII. Proceedings of the Wernerian Natural History So- 
ciety, - - 407 
XXXVIII. Scientific Intelligence, - 410 
I. natural philosophy, - ib. 
Astronomy. ,1. Second Comet of 1 8I9. 2. Rev. Mr Tough's 
new Orrery, - - - - ib. 
Optics. 3. Captain Colby on a curious instance of unusual 
Refraction. 4. M. Chossat on the Form of the Cornea and 
Crystalline Lens in the Eyes of Oxen, &c. 411 — 412 
Magnetism. 5. M. Wleugel on the Variation and Inclina- 
tion of the Needle at Copenhagen, - - 412 
Acoustics. 6. Subterraneous sounds in Granite rocks, 413 
Galvanism. 7. Improvement upon the dry Pile of Zamboni. 
8. Dr Hare’s Galvanic instrument called a Calorimotor. 9- 
Suker’s Galvanic Experiment in 1767, « 413 — 414 
