Vi CONTENTS. 



Page 



Mr. Phillips's Answer to Dr. Christrion's " Reply." 936 



R6V. J. R Emmett's Telescopical Observations on the Moon 33? 



Mr. Goldingham on the Pendulum at the Equator {concluded) 342 



M. Pelletier on Cafein 354 



Mr. Sturgeon on an improved Electro-magnetic Apparatus. (With a 



Plate.) 357 



Mr. Gray on the Genus Hinnites s6l 



Mr. Graham on Alcohol derived from the Fermentation of Bread 36S 



Mr. Levy on the Tungstate of Lead , 364 



Mr. Meikle on the Law of Temperature 366 



Mr. Stephens's Suggestions for the Improvement of the British System of 



Chemical Instruction 36g 



M. Balard on a peculiar Substance contained in Sea Water 38 1 



Proceedings of the Medico-Botanical Society of London 387 



On the Confinement of Dry Gases over Mercury 388 



Cafein 389 



Iodine found in the Mineral Spring of Bonniugton, near Leith Vw . i, t T. . . 3Q0 



liquidity of Sulphur at common Temperatures ^'. .... . . SQO 



Detection of Arsenic SQl 



Analysis of Halloyite 391 



Cold produced by Combination of Metals 392 



Notice on the Digestive Organs of the Genus Coraatula of Lamarck, and 



on the Orinvidea of Muller 392 



Splendid Collection of Shells 394 



New Scientific Books 394 



New Patents 395 



Mr. Giddy's Meteorological Journal 396 



Mr. Howard's Meteorological Journals » , 397 



NUMBER VI.-DECEMBER. 



Dr, Thomson on Anhydrous Sulphate of Soda 401 



M. Pianche on the Reaction of Sulphate of Magnesia and Bicarbonate of 



Soda , 403 



Dr. Prout on Digestion * 405 



M. Balard on a peculiar Substance contained in Sea Water (^concluded). .. 411 



Rev. Mr. Emmett on Combustion 42(5 



Rev. Mr. Emnett on Gaseous Bodies 434 



Rev. Mr. Emniett's Telescopical Observations on the Moon 434 



Mr. Faraday on the Existence of a Limit to Vaporization 436' 



Accountof some Volcanic Eruptions, &c. in the Islands of Japan 442 



Heights of Mountains in England and Wales 448 



Analytical Account of the Memoirs of the Astronomical Socieiy of Lon- 

 don, Vol.11. Part II 453 



Proceedings of the Royal Society. 457 



— Linnvan Society 457 



