Art. I. 
II. 
Il. 
CONTENTS OF VOLUME XLIX. 
NUMBER I. 
On the Physical Geology of the United States east of the 
Rocky Mountains, and on some of the Causes affecting 
the Sedimentary Formations of the Earth; by Prof. 
Witiiam W.MarHeER, - - : - : 2 
Account of some new Articles of Philosophical Appara- 
tus; by Prof. E. 8. SNELL, - - - : a 
Review of Dr. C. T. Jacxson’s Final Report on the Geol- 
ogy and Mineralogy of the State of New Hampshire ; 
by Tuomas T. Bovve, - : - - - - 
. Description of some Artificial Mounds on Prairie Jefferson, 
Louisiana; by Prof. C. G. Forsney, - - - 
. Caricography ; by Prof. C. Dewey,—(with a plate,) - 
. Origin of the constituent and adventitious Minerals of 
Trap and the Allied Rocks; by James D. Dana, - 
. Considerations respecting the Copper Mines of Lake Su- 
perior; by Lieut. D. Ruaetes, U.S. A., - - - 
. Singular case of Parhelion, with a statement of the Theory 
of ordinary Halos; by Prof. E. 8. Snexz, - - 
. Notice of a New Species of Batrachian Footmarks; by 
James Deane, M. D., : Bs 2 P 
. On the Copper and Silver of Kewenaw Point, re Supe- 
rior; by C. T. Jackson, - - E - 
. Practical Observations on the Generation of Statical Elec- 
tricity by the Electrical Machine ; by Lieut. GEorcz W. 
Rains, U.S. A., - : - Ec = A F 
. Ruins of Nineveh: Description of the Discoveries made 
in 1843 and 1844; by Rev. Azarian Suiru,M.D., - 
. On several New Plants; by Dr. M. C. LEavenwortn, 
. New Electro-Magnetic Engine; by Prof. Cuas. G. Page, 
20 
27 
38 
42 
49 
64 
73 
79 
8] 
93 
113 
126 
131 
LFLLO: 
