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V 





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IV •■ ^ CONTENTS 



SCIENTIFIC INTEIi LI G E N C fe . ^ 



Chemistry and Physics. — Rotation of the Plane of Polarization produced by the 

 Galvanic Current, 111. — Physical Deraonslration of the Rotation of the Earth 

 W by means of the Pendulum, 112, — Equivalent of Bismuth': Equivalent of Tung- 

 sten, 113, — Action of Light upon the lodid of Ethyl, 114: On a series of alka- 

 loids homologous with Ammonia, 115. — Constitution and products of the decom- 

 ^^ position of Codein, 116. — Acetic Acid from Sea-weeds : New test for the Ni- 

 trites and Nitrates, by George C. Sch^ffek, 117. 



Geology. — On the Parallelism of Mountain Chains in America, by Mr. DesoRjIIS. 

 ■Lower Silurian Reptile in Canada, 120. 



Zoology. — On the Classification of the Cancroiaea, by J. D. Dawa, 121. — Addi- 

 ditional note to the Remarks on the Classification of the Maioidea, by J. D. 

 Dana, 131. — Microscopic examination of Soundings, made by the U. S. Coast 

 Survey off the Atlantic Coast of the United States, by Prof J. W. BaileYj 132. 



Astronoviy. — On the new Ring of Saturn; by W. C. Bond, Esq., 133. — On the 

 Total Eclipse of the Sun, of July 28, 1851, by R. T. Paine, Esq., 134. 



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Miscellaneous Intelligence. — Electro-magnetic Locomotive, 139. — Meeting of the 

 American Association for the Advancement of Science at Cincinnati, 141 

 Gold in Arkansas : Rise and Fall of Lake Erie, 143. — Obituary. — Dr. S. G. 

 Morton, 144. — Oersted, 147.— Jacobi, 148. 



Billio^aphy. — Astronomical Observations, made under the direction of Lieut. 

 M. F. Maury, U.S.N., during the year 1846, 149. — Practical Mineralogy, As- 

 saying and Mining, by Frederick Overma:^, Mining Engineer: A Chart giv- 

 ing an Ideal Section of the Successive Geological Formations, by James Hall, 

 150. — The Christian Retrospect and Register, a summary of the Scientific, Moral 

 and Religious Progress of the first half of the XlXth century, by Robert 

 Baihd: Annals of the Lyceum of Natural History of New York, 151. 



List of Works, 152. 



NUMBER XXXV. 



Page 



153 



Art. XVIL Observations on the Pluton Geysers of California ; 

 ^ by Prof, FoKEST Shepherd, ...... 



XVIIL Report of Prof. Alexander D. Bache, Superintendent 

 of the United States Coast Survey, showing the progress of 

 that work for the year ending October, 1850, - - . 158 

 XTX. On Coral Reefs and Islands; by James D. Dana, - - 165 

 XX. On the Flow of Elastic Fluids through Orifices ; with a sug- 



gestion of a new niethod of determining the mutual relations 



tD 



of Elastic Force, Temperature and Density in an Expand- 

 ing Fluid ; by Eli W. Blake, 



XXL On the Relation of the Chemical Constitution of Bodies to 



186 



Taste ; by Prof. E. N. Horsford, .... 195 



