CONTENTS. y 



Page. 



sil Caoutchouc, 215. — Gold in France: Artificial preparation 

 of Sucjar: Action of Alcohol upon Alkalies, 216. — Iodine in 

 Coal : Six new species of Kangaroo, 217. — Proceedings of the 

 Tenth Meeting of the British Association : Necrology, 218. 



NUMBER II. 



Art. I. Notice of the Botanical Writings of the late C. S. Rafi- 



nesque, 221 



II. Abstract of a Letter to Baron A. Humboldt, upon the In- 

 vention of the Mariner's Compass, .... 242 



III. A Method of determining the Temperature of the Mercury 



in a Siphon Barometer, from the observed upper and low- 

 er readings; and of testing the accuracy of the instru- 

 ment; by Prof. Farrand N. Benedict, . . . 250 



IV. Catalogue of the Mollusca of Middlebury, Vt. and vicini- 



ty, with observations ; by Prof. C. B. Adams, . . 266 



V. On the Means of detecting Arsenic in the Animal Body, 

 and of counteracting its Effects; by J. Lawrence Smith, 

 M.D., ........ . 278 



VI. On the Extrication of the Alkalifiable Metals, Barium, 



Strontium, and Calcium ; by Prof. Robert Hare, M. D., 293 

 VII. Description of an Apparatus for Deflagrating Carburets, 

 Phosphurets, or Cyanides, in vacuo or in an Atmosphere 

 of Hydrogen, with an account of some Results obtained 

 by these and by other means; especially the Isolation of 

 Calcium ; by Robert Hare, M. D., .... 303 



VIII. Abstract of the Proceedings of the Tenth Meeting of the 



British Association for the advancement of Science, . 308 

 IX. Abstract of a Meteorological Journal for the year 1840, 



kept at Marietta, Ohio; by S. P. Hilcreth, M. D. , 345 

 X. Contributions towards a History of the Star-Showers of 



Former Times; by Edward C. Herrick, . . . 349 

 XI. On Native and Meteoric Iron ; by Prof. Charles Upham 



Shepard, M. D., 366 



XII. On the First, or Southern Coal Field of Pennsylvania ; by 



M. Carey Lea, 370 



XIII. Proceedings of Scientific Societies, .... 374 



XIV. Bibliographical Notices : — Plantse Javanicae Rariores : 



Hooker's Tcones Plantarum, 391. — The Linnaea, 392. — 

 Reports on the Progress^of Botany, 393. 



