CONTENTS 



OP 



THE QUARTERLY JOURNAL, 



No. XXXV. 



ART. PAGG. 

 I. Notes on the Geography and Geology of Lake Superior. By 

 John J. Bigsby, M.D., F.R.S., and M.G.S. 1 



IL Of the Effects of the Liduced Magnetism of an Iron Shell, on the 

 Rates of Chronometers. By Geo. Harvey, Esq. F.R.S.E., 

 M.G.S., &c S4> 



HL An Account of the Native Oil of Laurel. By Dr. Hancock, of 

 Demerary 47 



IV. On the Use of the Pocket Box-Sextant to Travellers, &c. . . 50 



V. On the Concretionary and Crystalline Structures of Rocks. By 



J. Macculloch, M.D., P.R.S., &c 60 



VI. Astronomical Phenomena, arranged in Order of Succession for 



the Months of Octoher, November, and December, 1824 . . 81 



VII. On the Boiling; Points of Saturated Solutions. By T. 

 Griffiths 89 



VIII. On Fumigation. By M. Faraday, F.R.S., Corr, Mem. 

 Acad. Sciences, Paris, Chem. Assist. Royal Institution, &c. 92 



IX. On the General Nature and Advantages of AVheels and Springfs 

 for Carriages, the Draft of Cattle, and the Foito of Roads. By 

 Davies Gilbert, Esq. F.R.S. &c 95 



X. Astronomical and Nautical Collections. No. XIX. 99 

 i. A Method of finding the Latitude at Sea, by the Altitudes of 



two fixed Stars when on the same Vertical. By C. Blackburnk, 

 Esq. of the Royal Naval College, Portsmouth 99 



ii. A Rule ft)r finding the Latitude by two Altitudes of the Sun, or 

 of a fixed Star, and the Time elapsed between the Observations . . 102 



Vol. XVIII. a 



