iV CONTENTS. 



r 



SCIENTIFIC INTELLIGENCE 



Chemistry and Physics. — A new oxyd of Silicon : On the artificial production of Glycer- 

 ine : Preparation and properties of Manganese, 140. — Oa crystallized Chromium and 

 its alloys ; On some general methods of preparing the elements, 141. — On the amids of 

 the monobasic acids : Oa a new series of organo-thionic acids, 142. — Note on Ritchie's 

 improved Ruhmkorff's Apparatus, by the author : Silica and alumina in the ashes of 

 Lycopodium, 143. 



Mineralogy and Geology, — Supplement to the Fifth edition of a Manual of Elementary 

 Geology, by Sir Charles Lvell, 143. — Report on the Geological Survey of South 

 Carolina, by Oscar M. Lieber, 145.— New Fossil Fibhes Irom the Devonian Rocks of 

 Ohio, by J. S. Newberry, M.D., 147. — Report on the Economical Geology of the route 

 oi the Ashtabula and New Lisbon Railroad, by J. S Newberry, M.D. : Descriptions 

 of new Fossil Species of Mollusca, collected by Dr. F. V. Hayden, in Nebraska Terri- 

 tory, by F. B. JVIeeh: and F. V. Havden, 149. — Proportion of Bivalves of different 

 Geological Ages : Slaty Cleavage, 159. — The genus Paiseolrochis of Emmons, 151. 



Botany and Zoology. — Introduction to Cryplogamic Botany, by Rev. J. M. Rkrkeley, 

 JVI.A., F.L.S., ISI.—Witierung und Wachsthum,oderGrundziige der Pflauzenklimatolo- 

 gie, i e. Weather and Growth, or Elements of Climatology as affectitig Plants, by H. 

 Hoffmann, M.D., etc.: Revisio Poienlillarum Iconibus lllustraia, auciore C\ Leh- 

 MANN, 153.— Conspectus Systeraaticus Ilydriilearum, auctore R. Caspar y, 154. — Me- 

 moire sur le Vallisneria spiralis, L., par An. Cuatin : Freshwater Bivalves : Agassiz, 

 155, 



Miscellaneous Scientific TnCcUigence. — Cold Weather, 155. — Filtration through Sand, 157. 

 Density of the Earth : Ariehian Well of Mondorf : Notice of a brilliant Meteor seen 

 lie Lr Lake Winnibigoshish, Minuesota, by Rev. B. F. Odell : Prof. Bailey : American 

 Association for the Advancement of Science : Key lo the Geology of the Globe, by 

 Richard Owkn, M.D., 158. — Const Survey Report for the year 1855 : Foj^sils of South 

 Carolina, by .^I. Tuomey and F. S. Houmes : The LJ. S. ^aval Agronomical Expedi- 

 tion to the Southern Hemisphere, during the years 184D-1 52 : Familiar Abirouomy, or 

 an Introduction to the Study of the Heavens, by Hannah M. Buuvier, 159.— The 

 Testimony of the Rocks, or Geology in its bearings on the Two Geologies, natural and 

 revealed, by Hugh Milleh: A Manual of the Detection of Poisons, by Medico- 

 Chemical analysis, by Dr. F. J. Otto : Elements of Chemistry, including the Applica- 

 tions of the Science in the Arts, by Thomas GRAtiAM, F.R.S.L., etc. : Chemical Prob- 

 i^ms and Reactions, by J. P. Cooke, 160. — Obituary, — A. Dufrenoy, 160.' 



NUMBER LXXI 



Page. 



IGl 



Art. XIIL Biograpliical Memoir of Fratirols Andre Michaux ; by 



El-IAS DaRAi\D, 



XIV, Investigations on ihe Rock Guano from the Islands of the 



Caribbean Sea; by Wm. J. Taylor, ■ - - . - 177 



XV. On the Interaction of Natural Forces; by H. Helmholtz, 

 Professor of Physiology in the University of Konigsberg, - 189 



