Y. 3 ? 
CONTENTS ■ 
OF 
No. XV. 
Page 
Art. I. On the Ice-caves or Natural Ice-houses found in some 
of the Caverns of the Jura and the Alps. By M. A. 
Pictet, F. R. S. L. & E. &c. and Professor of Natu- 
ral Philosophy at Geneva, - - I 
II. Memoir of the Life and Writings of Olaus Swartz, 
M. D. Professor of Botany at Up sal, Knight of the 
Orders of V asa and of the Polar Star, Member of the 
Acad. Caesar. Nat. Cur. &c. By Kurt Sprengel, M. D. 17 
III. Account of a New Percussion Lock, by Mr George 
Forrest, Gunsmith, Jedburgh* In a Letter from 
Mr Lizars to Dr Brewster, - - 24 
IV. Account of a New Escapement. By Mr David White- 
law, Watchmaker, 16 . Prince's Street, Edinburgh, 27 
V. On the Calcareous Tufas of Hungary. By F. S. Beu- 
dant, Chevalier of the Royal Order of the Legion of 
Honour, &c. - 29 
VI. On the Use of Perfumes in preventing the Formation 
of Mouldiness. By John MacCulloch, M. D. and 
F. R. S. &C. Communicated by the Author, - 33 
VII. Notice respecting an Ancient Ship discovered in a 
Garden at Stranraer, in Galloway. By Alexander 
Kennedy, M.D. F. R. S. E. &c. &c. Communicated 
by the Author, *• - - - 36 
VIII. Further Remarks connected with the Physiology of the 
Fibres of the Root. By John Murray, F. L. S., 
M. W. S. &c. Communicated by the Author, 37 
IX. Remarks on the Increase of the Population of the United 
States, and Territories of North America, with Ori- 
ginal Tables, deduced from the American Population 
Returns, to illustrate the various rates of Increase in 
the White Population and Slaves, and also the Com- 
parative degrees in which Agriculture, Commerce 
and Manufactures prevail. By George Harvey, 
Esq. Member of the London Astronomical Society. 
Communicated by the Author, - * 41 
