CONTENTS OF VOLUME XXIX. 



NUMBER I. 



Page. 

 Art. I. Observations on the Bituminous Coal Deposits of the valley of the 

 Ohio, and the accompanying rock strata; with notices of the fossil or- 

 ganic remains, and the relics of vegetable and animal bodies, illustra- 

 ted by a geological map, by numerous drawings of plants and shells, 

 and by views of interesting scenery; by Dr. S. P. Hildreth, of Ma- 

 rietta, Ohio, --------1 



MISCELLANIES. 



1. Halley's Comet, - - , 155 



2. Coins and medals, ..-.--- 157 



3. List of new publications since the commencement of the present year, 161 



4. Facts respecting the meteoric phenomena of Nov. 13lh, 1834, - 168 



NUMBER II. 



Art. I. Remarks on the Geology of the Lakes and the Valley of the Missis- 

 sippi; by Judge Gibson, of Pennsylvania, ... qqI 

 II. Fata Morgana at Gibraltar; by an officer in the American Navy, 214 



III. Visit to the duicksilver Mines of Idria ; in a letter from an officer in 



the American Navy, ...... 219 



IV. The Traun Stein Rock ; in a letter from an officer in the U. S. Navy, 223 

 V. The Salt Mountains of Ischil; by an officer in the American Navy, 225 



VI. Remarks on the Topography, Scenery, Geology, &c. of the vicinity of 

 the Cape of Good Hope ; by Mr. George Champion, a Missionary in 

 Southern Africa, -.-..-. 230 

 VII. Physical Observations, made on board the U. S. ship Erie, during her 

 passage from New York to Rio Janeiro, in 1834, and communicated 

 to the Navy Department ; by D. J. Browne, - . . 237 



VIII. On the Deutarseniuret of Nickel, from Riechelsdorf, in Hessia; by 



James C. Booth, ....... 241 



IX. Explosive Reaction of Hydrogen with Chlorine, under the influence 



of the solar r^j%\ by R. Hare, M. D. Prof, of Chem. in Univ. Penn. 243 

 X. Apparatus for the Evolution of Cyanhydric or Prussic Acid ; by R. 



Hare, M. D. Prof, of Chemistry in the University of Pennsylvania, 244 

 XI. Caricography ; by Prof. C. Dewey, - - - - 245 



XII. On Water Spouts ; by Lieut. H. W. Ogden, of the U. S. Navy, 254 



XIII. Researches on the Commercial Potash of the State of New York; by 



Prof. Lewis C. Beck, M.D. ..... 260 



XIV. Remarks on the theory of the Resistance of Fluids ; by Eli W. Blake, 274 

 XV. A Letter on Otaheite ; addressed to B. L. Oliver, Esq. of Boston, and 



by him translated, ...... 283 



XVI. Notice of some American Birds; by Charles Fox, of Durham, (Eng.) 291 

 XVII. Meteorological notices in Indiana ; by D. Dale Owen, - - 294 



XVIII. Chronometers, .._.... 297 



XIX. Notices in Natural History ; by Judge Samuel Woodruff, - 304 



XX. Ornithichnology. — Description of the Foot Marks of Birds, (Orni* 

 thichnites,) on new Red Sandstone, in Massachusetts ; by Prof. Ed- 

 ward Hitchcock, ----... 307 



XXI. On Currents in Water; by Alan W. Carson, ... 34O 

 XXII. Of the Parallelogram of Forces; by Prof. Theodore Strong, - 345 



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