iv CONTENTS. 
Zoology.—On the Classification of the Crustacea Corystoidea, by James D, Dawa, 
119.—Conspectus Crustaceorum, &c.—Conspectus of the Crustacea of the Ex- 
ploring Expedition under Capt. Wilkes, U.S.N., by James D. Dana, 121.— ; 
n the Genus Orthostoma, by James D. Dana, 123.—Genus Heterograpsus 
of Lucas: On Recent Researches into the Natural History of the British Seas, 
by Prof. Epnwarp Forsss, 124. 
Astronomy.—New Planet Eunomia: First Comet of 1851, 127.—Second Comet of 
1851: Aurora Borealis of September 29th, 1851.—Note on the Aurora Borealis 
of Sept. 29th, 1851, by Prof. J. Lx Conre, 128.—Account of a Reflecting Tele- 
scope constructed by Mr. Joseph Lyman, of Lenox, Mass., 129. 
Miscellaneous Intelligence.—Notes on Vesuvius, and Miscellaneous Observations on 
Egypt, 131.—Effects of Lightning, by Prof. Wm. Corrin, 134: Coating Metals ; 
Henry Grissell’s improvement in coating metals with other metals, 135.—On 
the Gamboge Tree of Siam, by Dr. Curtstison,137.—Patent for a Safety Paper 
granted to W. Stones: On the Manufacture of Candles, by W. Carrmaen, Esq., 
139.—On the Meteoric mass discovered at Schwetz, by M. G. Rosr: Xenotime 
from the Gold region of Georgia, 142.—Xenotime in the Gold region of North 
Carolina: Daguerrotypes: Vegetable Parasites in Sugar: Climate of Nischne 
Tagilsk, Urals: Theory of Storms: On the Resuscitation of Frozen Fish, by- 
Prof. 8. P. Laruror, 143.—Cavendish Society: University of Mississippi: 
William and Mary College, Va., 144.— Obituary.—Richard Cowling Taylor, 144. 
Bibliography.—Elements of Analytical Geometry, by Professor ALtzert E. 
- 147.—Maury’s Wind and Current Chart, 149.—Shells of New 
_ England, by Wm. Stimpson: A. P. de Candolle, sa Vie et ses Trauvaux, par 
pe ta Rive: Iconographic Encyclopedia, 150. 
List of Works, 150. 
NUMBER XXXVIII. 
Axt. XII. Extracts from a Memoir of Samuel George Mor- 
ton, M.D., late President of the Academy of Natural Sci- 
ences of Philadelphia; by Cuartes D. Mries, M.D., - 153. 
XII. An Excursion on Etna; by B. Smuumian, Jr., ee i 
XIV. On Coral Reefs and Islands; by James.D. Dawa, -  - 185 
XV. Observations on the Freezing of Vegetables and on the 
Causes which enable some Plants to endure the action of 
extreme Cold; by Prof. Joun Le Conte, M.D., - - 195 
XVI. On the Compound Ammonias, and the bodies of the Caco- 
dyle Series; by T.S. Hunt, - =. - sks 06 
XVII. The Pendulum Experiment; by Lieut. D. P. Woopvzury, 212 
XVIII. Peculiarities of the Climate, Flora, and Fauna of the 
South Shore of Lake Erie, in the vicinity of Cleveland, 
Ohio; by J.P. Kirttanp, —- ~ 
- - = - 
