IV CONTENTS. 



\ 



Page. 



Si 4- An Essay on the Development and Modifications of the 



externa] Organs of Plants — Journal of llic Essex County 



(Mass.) Natural History Society, . . . • # 187 



5. Transactions of the American Philosophical Society, . . 188 



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



Progress of the U. S. Exploring Expedition, . . 189 



8, 9. Cold Bokkeveld Meteorites — Meteoric Iron from Potosi, 190 



10, 11. Encke's Comet — Remains of the Mastodon in Missouri, 191 



193 



193 



12. Latanium, a New Metal, ...... 



13. Biography of Scientific Men, . . • 



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



thern Lynx taken in Connecticut — Preservation of animal 

 Fat for Soap Making, . . • . . 



17. Notice of Vcspertilio Pruinosus and Icterus Fhceniceus, 



18. Malaria, 



19. Electrical Excitement in Leather by Friction, . 



30, 31. Great Scheme for Magnetical Observations — Action of 



Spongy Platina, 



22. Formation of Metallic Veins by Galvanic Agency, 

 To our Subscribers and Readers, • . . , 



NU3fBER 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, 



IL Observations on the Geology of the Trinity Country, 



Texas, made during an excursion there in April and 



194 

 195 

 196 



197 



198 



199 

 200 



201 



240 



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, 



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

 ter Dewey, .-.•..• 



VL On the Effects of Light and Air in restoring the faded 



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



VIL Of the Reaction of Sulphuric Acid with the Essential 



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



242 



