vi 



CONTENTS. 



Astronomy.— Shooting Stars of August 10, 1856.— Astronomical Observatory at the 

 University of Mississippi, 290. 



Miscellaneous Intelligence.— Observations on the climates of California, by George 

 Bartlett, 291. — Apparatus for taking specific gravity, by Messrs. Eckfeldt and 

 Dubois, 294. — Discovery of Palaeozoic Fossils in Eastern Massachusetts, by Professor 

 W. B. Rogers, 296.— Hailstorm in Guilford County, N. C, 298.— Monks Island or 

 Colombian Guano, by Dr. A. S. Piggot, 299.— On the Monks Island Guano, by Dr. 

 A. A. Hayes, 300.— Neo-Macropia : Artificial light for taking photographs, 300.— Wa- 

 ters of the Dead Sea : Density of the Waters of the Caspian Sea, by A. Moritz : 

 Well in the Desert of Sahara : Composition of the Water of the Delaware River, by 

 Henry Wurtz : Aluminium : Officers of the Academy of Science for St. Louis, 

 for 1856, 301.— Obituary.— Professor John Locke, 301.— Manual of Coal and its Topog- 

 raphy, by J. P. Lesley, 301.— A Treatise on Land Surveying, by Professor W. M. 

 Gillespie, A.M. : Annals of the Astronomical Observatory of Harvard College, 302. 

 — Manual of Blowpipe Analysis, for the use of Students, by Prof. William El- 

 dekhorst : Notices of new Publications, 303. 



NUMBER LX VI. 



Page. 



Art. XXIV. On American Geological History : Address before 

 the American Association for the Advancement of Science, 

 August, 1855, by James D. Dana, 306 



XXV. On the Plan of Development in the Geological History of 

 North America, with a map ; by James D. Dana, - - 335 



XXVI. Re-determination of the Atomic Weight of Lithium ; by 



• Prof. J. W. Mallet, - - - - - - - 349 



XXVII. On the Relations of the Fossil Fishes of the Sandstone 

 of Connecticut and other Atlantic States to the Liassic and 

 Oolitic Periods ; by W. C. Redfield, .... 357 



XXVIII. On the Application of the Mechanical Theory of Heat 



to the Steam Engine ; by R. Clausius, - • - - 364 



XXIX. Examination of the Meteoric Iron from Xiquipilco, Mexico ; 



by W. J. Taylor, - 374 



XXX. On the Heat in the Sun's Rays ; by Elisha Foote, - 377 



XXXI. Circumstances affecting the Heat of the Sun's Rays ; by 

 Eunice Foote, 382 



XXXII. Review of a portion of the Geological Map of the United 

 States and British Provinces by Jules Marcou ; by William 



P. Blake, 383 



XXXIII. On New Fossil Corals from North Carolina; by E. 

 Emmons, 389 



