IV CONTENTS. 



3, 4. An Essay on the Development and Modifications of the 

 external Organs of Plants — Journal of the Essex County 

 (Mass.) Natural History Society, .... 



5. Transactions of the American Philosophical Society, . 



6, 7. Notice of the Journal of the Statistical Society of London 



— Progress of the U. S. Exploring Expedition, 

 8, 9. Cold Bokkeveld Meteorites — Meteoric Iron from Potosi, 

 10, 11. Encke's Comet — Remains of the Mastodon in Missouri 



12. Latanium, a New Metal, 



13. Biography of Scientific Men, 



14. 15, 16. Note by Mr. E. F. Johnson, Civil Engineer— A Nor 



them Lynx taken in Connecticut — Preservation of animal 

 Fat for Soap Making, ...... 



17. Notice of Vespertiiio Pruinosus and Icterus Phceniceus, 



18. Malaria, 



19. Electrical Excitement in Leather by Friction, . 



20. 21. Great Scheme for Magnetical Observations — Action of 



Spongy Platina, ....... 



22. Formation of Metallic Veins by Galvanic Agency, 

 To our Subscribers and Readers, ..... 



Page. 



187 

 188 



189 

 190 

 191 

 192 

 193 



194 

 195 

 196 

 197 



198 

 199 

 200 



NUMBER II. 



Art. I. Chemical Examination of the Fire-Damp from the 

 Coal Mines near Newcastle. By [the late] Edward 

 Turner, M. D., F. R. S. Lon. and Edin., V. P. G. 

 S., Professor of Chemistry in the University of 



London, 201 



II. Observations on the Geology of the Trinity Country, 

 Texas, made during an excursion there in April and 

 May, 1839; by Prof. J. L. RiDDELL, M. D., . 211 



III. Extracts from the Anniversary Address of the Rev. 



Wm. Whewell before the Geological Society of 

 London, 218 



IV. On the Polished Limestone of Rochester ; by Prof. 



Chester Dewey, ...... 240 



V. On the Temperature of Lake Ontario ; by Prof. Ches- 

 ter Dewey, ....... 242 



VI, On the Efiects of Light and Air in restoring the faded 



Colors of the Raphael Tapestries ; by Mr. Trull, 244 



VII. Of the Reaction of Sulphuric Acid with the Essential 



Oil of Hemlock ; by Clark Hare, . . . 246 



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