• • 



CONTENTS. Vll 



Page. 



364 



372 



XXVI. Chemical Examination of the Water of the Tuscarora 

 Sour Spring, and of some other Mineral Waters of Western 

 Canada ; by T. S. Hunt, 



XXVII. On the Decomposition of Aniline by Nitrous Acid ; by 

 T. S. Hunt, 



XXVIII. Description of a Coal Plant supposed to be new ; by 

 Charles Whittlesey, Esq., -.-.-- 



XXIX. Description and Analyses of several American Minerals ; 

 by Prof. B. Silliman, Jr., ..---. 



XXX. On the Prime Meridian ; by Lieut. Davis, U. S. N., - 394 



XXXI. Contributions to the Mycology of North America; by the 

 Rev. M. J. Berkeley, and the Rev. M. A. Curtis, - - 401 



375 



377 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Deflection of the Magnetic Needle by the act of Volition, 

 404. — On the Development of Electricity in the Act of Muscular Contraction, 

 by M. Becqi krel, 405 — Note relative to the Electricity developed by Mus- 

 cular Contraction, by M. C. Despkktz, 406, — On the Polarization of Heat : 

 Composition of Bones, 410. — On the Specific heat of Potassium, with remarks 

 on the equivalents of SiKca and the Alkalies, by V. Regnault, 411. — On Chlo- 

 roniceic Acid, by M. E. Saint Evre : On the Chlorinated Produels of the De- 

 composition of Quinic Arid, by Dr. G. Staedler, 412 — Volatilization of Car- 

 bon, by C. Despret/,413.— On the Atomic Weight of 'Silica, by II K»>pp,4J4. 



Mineralogy and Geology. — Notes on the California Gold Region, by Rev. C. S. 

 Lyman, 415. — Geological Survey of Tennes-ee, 419. — On the Altered Dolo- 

 mites of the Island of Bute, by James Bryce : Plumbic Ochn from Mex- 

 ico, 420. — On the Formation of Minerals, by M. H. de Senarmont : On the 

 Decomposition of Rocks, by M. Ebelmen, 421. — Phosphate of Lime in Green- 

 sand and Marl, 422. — Arkose, 424. 



Zoology. — Conspectus Crustaceorum, &c, Conspectus of the Crustacea of the Ex- 

 ploring Expedition, by J. D. Dana, 424. — Gammaracea, 42b. 



Astronomy. — Elements of the planet Hygeia : Second Comet of 1849, 428. — Gou- 

 jon's Comet : Shooting Stars of April 20, 1849 : Shooting Stars of August 



10, 1849, 429. 



Miscellaneous Intelligence. — On the Magnetic Relations of the Positive and Nega- 

 tive Optic Axes of Crystals, by Professor Pluckkr, in a letter to Dr. Faraday, 

 430. — Some facts relative to the Spheroidal State of Bodies, Fire Ordeal, Incom- 

 bustible Man, Ac, by P. H. Boctigpty, 431. — Practical Application of the Law 

 ointed out by Dr. R D. Thomson, of the proper Balance of Food in Nutrition, by 

 )r.C. Rfmigius Fresemus,435 — Meteorite of Arva, 439. — On the Preparation 

 of a Glaze for Porcelain resembling Aventurine, by A YV\echter, 440—On 

 Chicory-CofFee, its History, Manufacture, Adulterations and means of detecting 

 them, bv A. Chevalier, 441. — On an unnoticed kind of abnormal vision, by 

 Prof. C.'Dewev. 4 43.— Analysis of the Waters of the Dead Sea, by R. P. F. 

 Marciiand : American Association for the Advancement of S( nee: British 

 Association, 444. — Total Quantity of Lead Ore raised and Lead smelted in the 

 United Kingdom in 1818, 448— California Gold: Coal in Egypt: Astronomical 

 Journal, 44i>.— Geological Surveys of the United States, 4.'>0.— -Obituary.— Lud- 

 wig Frederick Wilhelm August Seebeck : Johann Wolfgang Dobereiner : 

 Wilheim Ferdinand Erichson, 450. 



Bibliography. — Iconographic Encyclopaedia of Science, Literature and Art, sys- 

 tematically arranged, by G. Heck, 451.— Genera Flora? Americas Boreali-ori- 

 entalis illnstrata, figures, &c. by Isaac Sprague, descriptions, &.c. by Prof. 







