vi CONTENTS. 
per Amalgam, by Dr. Perrenxorer, 282.—Benzole, by C. B. Mansrizip: 
_ On the Separation of Phosphoric Acid from Alumina, by H. Roser, 283.—On 
the Atomic Weight of Silica, by H. Kopp, 284.—On the Extraction of Man- 
nite from the Dandelion, by Messrs. Suir, 285. 
Mineralogy and Geology.—On Danburite, by J. D. Dawa, 286.—On the discov- 
ery of Sulphuret of Nickel in Northern New York, by Dr. Franxuin B 
Hoven, A.M., 287.—New Mineral Localities in New York, by Dr. F. B. Hoven, 
gree fe of es Minerals associated with the Emery of Asia Minor, by 
J. Lawrence Smitu: On the Degradation of the Rocks of New South Wales 
and Pirbativs of Valleve: by J. D. Dawa, 289. 
Zoology. Mm oe on Zoophytes, by James D. Dana, 294.—A new od of Or- 
chestide, by J. D. Dawa: On the genus Astrea, by James D. Dana 
Miscellaneous Intelligence—On the Extraction of Gold from the Ghiper Orde of 
Chessy and Sain-Bel, by Messrs. ALuain and Barrensacn, 297.—The Table 
Land of Thibet, 298.—On the Classification of Colors, Part II, by Prof. J. D. 
Forses, 300.—New Process for extracting Sugar from the Sugar-cane, by M. 
Mexsens, 301.—Anniversary of the Royal Society of London: Ray Society : 
Poskogical Gardens: Mastodon angustidens: Development of Electricity by 
Muscular Contraction, 304.—Influence of boracic acid in Vitrification, 305.— 
Obituary —Dr. Martin Gay, 305. 
gorges —Report of a Geological Reconnoissance of the Chippewa Land Dis- 
of Wisconsin, and, incidentally, of a portion of the Kickapoo Country, and 
et a part of Iowa and of the Minesota Territory, by Davipv Date Owen, 306. 
—The Races of Man and their Geographical Distribution, by CHARLEs foe 3 
ErinG, M.D., 307.—Elements of Natural Philosophy, by Atonzo Gray, A 
Sailing idles, by Lieut. M. F. Maury, U.S.N., 308.—The Plough, the 
Loom and the Anvil, T. 8S. Skinner, Editor : Iconographic Encyclopedia of 
Science, Literature and Art, by G. Heck, translated and edited by Prof. Spen- 
_ cer F. Bairn: Foster's Geological Chart: The Annual of Scientific Discovery, 
or Year Book of Facts in Science and Art, edited by Davin A. Weuts, and 
Grorce Buss, Jr.; Agassiz’s Lake Superior: The Astronomical Journal, 309. 
—Journal of the Academy of Natural Sciences of Philadelphia, 310.— Memoirs 
of the American Academy of Arts and Rplencen; 311.—Boston Journal of Natu- 
ral History, Vol. V1, No. 1, 312. 
List of Works, 312. 
NUMBER XXVIII. 
Art. XXXI. A brief Memoir of the late Walter Folger, of Nan- 
tucket; by Witttam MitcHett,~ - 313 
XIf, On the Application of Photography to he Self. ES eeiatehs 
tion of Magnetical and Meteorological Instruments ; my — 
ree so insite, RA. FBS. 319 
XXXII. Influence of the known Lect of Motion on * onary 
sion of Elastic Fluids; by Ex1 W. Buaxz,~ - . 334 
XXXIV. On the Rotation of the Plane of Polarization of Heat Ky 
Magnetism; by MM. F. pe ua Provostaye and P. Desains, 344 
XXXV. Historical account of the seein on Hawaii ; sh 
James D. Dana, - 347 
Z 
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