CONTENTS.. VII 



1'age 



Cow-Pox in Persia 390 



Further Observations by S. in Answer to X 3gi 



Mathematical Problem. By Mr. Adams 392 



Urinary Concretion on a Leaden Pipe 394 



Aurora Borealis. By Dr. Burney 395 



Col. Beaufoy's Astronomical, Magnetical, and Meteorological Observa- 

 tions, for September 396 



Mr. Howard's Meteorological Journal for September 399 



NUMBER LXXXIV.— DECEMBER. 



On the Figure of the Earth. By M. de Laplace 401 



Essay on the Turquoise and the Calaite. By Dr. Gotthelf Fischer. (With 



a Plate) 406 



Researches on a new Mineral Body found in the Sulphur extracted from 



Pyrites at Fahlun. By J. Berzelius {continued) 420 



Experiment with the Solar Microscope. By Mr. James Watson 428 



Population of Bombay. By Sir James Mackintosh, M.P 429 



A Memoir on some new Combinations of Prussic Acid. By his Excel- 

 lency the Count Le Maistre 440 



Observations on Gehlenite. By E. D. Clarke, LL. D 449 



On the Measurements of the Angles of Crystals. By H. J. Brooke, Esq. 453 

 Analytical and Critical Account of A Critical Examination of the First 



Principles of Geology. By G. B. Greenough. {concluded) 456 



Proceedings of the Royal Society, Nov. 4, 11, and 18 464 



Arsenic 466 



Calculus from the Bladder of a gouty Person 468 



Query respecting the Method of coating Metals with Platinum. By 



T. Howse, Sen 469 



On the Alloy of Platinum and Tin. By Dr. Clarke 470 



Chemical Chair at Berlin 470 



Water of the Dead Sea 470 



Beautiful luminous Phenomenon 472 



Boracic Acid in Tuscany 473 



Sagacity of a Newfoundland Dog 473 



Spontaneous Ptyalism accompanied by a diminished Secretion of Urine. 



By Dr. Prout 474 



Col. Beaufoy's Astronomical, Magnetical, and Meteorological Observa- 

 tions for October 476 



Mr. Howard's Meteorological Journal for October 479 



Index 481 



