11 



CONTENTS. 





XVIII. On the Rock Salt and Salines of the Holston ; by C. B. 



Hayden, --------- 



XIX. Description of a Carbon Voltaic Battery; by B. Silliman, 



Jr., A. M. ? 



XX. Bibliographical Notices : — Report on the Geology of Con- 

 necticut, 187. — Report on the Natural History of New 

 York, 18S. — Johnston's Lectures on the application of 

 Chemistry and Geology to Agriculture: Turner's Ele- 

 ments of Chemistry, by Liebig and Gregory, 189. — Par- 

 nell's Elements of Chemical Analysis, Inorganic and Or- 

 ganic, 190. — The Chemical Gazette, or Journal of Prac- 

 tical Chemistry, 191. — Kane's Elements of Chemistry, 

 by Dr. Draper: An effort to refute the arguments advan- 

 ced in favor of the existence of the Amphide Salts, or 

 radicals, consisting, like cyanogen, of more than one ele- 

 ment, by Robert Hare, M. D., 192. — Murchison's Silu- 

 rian System : The Climate of the United States and its 

 Endemic Influences, by Samuel Forry, M. D. : Boston 

 Journal of Natural History, 193. — Nuttall's continuation 

 of Michaux's North American Sylva, 194. — Choisy, de 

 Convolvulaceis dissertatio tertia complectens Cuscutarum 

 hucusque cognitarum methodicam enumerationem et de- 

 scriptionem, etc., 195. — Spring, Monographie de la Fa- 

 mille des Lycopodiacees, 196. — Endlicher, Mantissa Bo- 

 tanica, sistens Generum Plantarum Supplementum secun- 

 dum, 198. — Hooker's British Flora: Phillips's Mineral- 

 ogy, new American edition, 199. 



Miscellanies. — Entomological Society of Pennsylvania, 199. 

 Foot-Marks and other Artificial Impressions on Rocks, by Prof. 

 W. A. Adams, 200. — Dr. Draper's discovery of Latent Light, 

 and of a curious class of Spectral Appearances connected with 



Photography, 202. — On the Salt Steppe south of Orenburg, 

 and on a remarkable Freezing Cavern, by It. I. Murchison, 

 Esq., Pres. G. S., 205 — Extracts from a letter addressed by Sir 

 J. Herschel to Mr. Murchison, explanatory of the Phenomena of 

 the Freezing Cave of Illetzkaya Zatchita, 206. — Further ob- 

 servations on the Meteors of Aug. 10, 1842, 208. — Meteoric 



Observations in November, 1842, 209. 

 in December 



Meteoric Observations 



cover j of a Comet, 211. 



Copal, 212. 



1842, 210.— Solar Eclipse of July 8, 1842 : Dis- 



— Prof. Espy's Meteorological enter- 



prise : vjopal, 5812, — Discovery of an Electrical Fish on the 

 coast of the United States : To detect minute quantities of 

 Arsenic and Antimony, 213.— Mineralogical systems, 214. — 

 : Atomic Weights of Elements : Sugar in the Stalks of Maize, 

 215. — Correction of the statement concerning an alleged 

 "Show«r of red matter like blood and muscle :" Obituary of 

 Baron Louis Lederer, 216. 



Appendix. — Vindication of Claims to certain Inventions and Im- 

 provements in the Graphic Art; by Asa Spencer. 



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