VI CONTENTS. 



Page. 



VII. Variation of the Magnetic Needle at Providence, R. I., 

 from A. D. 1717 to 1843; by M. B. Lockwood, Civil 

 Engineer, _-.._>.. 314 



VIII. On the Law of Storms; by H. W. Dove, - - - 315 

 IX. Notice of the discovery of a New Locality of the " Infu- 

 sorial Stratum ;" by M. Tuomey, - 339 

 X. Letter from Richard Owen, Esq., F. R. S., F. G. S., &c. 

 &c, on Dr. Harlan's Notice of New Fossil Mammalia — 

 published in this Journal, Vol. xliii, p. 141, - - 341 

 XI. Notice of a new Trilobite, Ceraurus crosotus ; by Prof. 



John Locke, M. D., 346 



XII. Abstract of a Meteorological Journal, for the year 1S42, 



kept at Marietta, Ohio; by S. P. Hildreth, M. D., - 347 



XIII. Abstract of the Proceedings of the Twelfth Meeting of the 



British Association for the Advancement of Science, - 351 



XIV. Astronomy and Photography at Rome ; by J. Taylor, Esq., 373 

 XV. Notice of Dr. Hare's " Strictures on Prof. Dove's Essay on 



the Law of Storms;" by W. C. Redfield, - - 384 



XVI. United States Exploring Expedition, - 393 



XVII. Analysis of the Scott Spring, Scott County, Virginia ; by 



C. B. Hayden, - - - . - - - - 409 



XVIII. Notice of the Discovery of a nearly complete Skeleton of 

 the Zygodon of Owen (Basilosaurus of Harlan) in Ala- 

 bama; by S. B. Buckley, A. M., - - - - 409 

 XIX. Notice of the Great Comet of 1843, - - - - 412 



Miscellanies. — Fossil Birds, 417. — Passage of two or more Elec- 

 trical Currents over the same Conductor without interference : 

 Account of an exhibition of Shooting Stars, seen in the day 

 time, 418. — Earthquakes in the United States : Great Earth- 

 quake in the West Indies, Feb. 8 : On the Leafing of Plants, 

 419. — New York State Reports : Torrey and Gray's Flora of 

 North America : Thracia inequalis, 420. 



