CONTENTS* 



V 



Page. 



217 



XVL On the Formation of Craters, and the Nature of the Liquid- 

 ity of Lavas; by G. Poulett Scrope, Esq., M,P., F.R.S., 

 F.G.S.— (Concluded), ....... 



XVII. On the occurrence of Natro-boro-calcite with Glauber- 

 Salt in the Gypsum of Nova Scotia ; by Prof Henry Haw, 230 



XVIII. Arctic Explorations, by Dr. Elisha K. Kane, U.S. N., . 235 



XIX. A method of measuring ihe Angles of Crystals by reflec- 

 tion without the use of a Goniometer; by P. Casamajor, - 251 



XX. Explanation of the Motion of the Gyroscope ; by H. A. 

 Newton, 253 



XXI. Correspondence of Jerome Nickles — Academy of Scien- 

 ces ; Distribution of Prizes, 255. — Society for the Aid of the 

 Friends of Science: History of Science; Iron bridges, 258. 



Astronomical News: Electric Telegraph ; Submarine ca- 

 ble across the British Channel, 259. — Scientific Voyages : 

 Chemical Facts; Different slates of Siilphur, 260. — Magne- 

 ^ sium. Boron, Aluminium : Waters of Artesian Wells : Pho- 



tography ; the regular Universal Exhibiiion by the French 

 Photographic Society, 26L — Bibliography, 262. 



SCIENTIFIC INTELLIGENCE. 



Chemhtry and Phi/sics,— On a biacid alcohol, 26*2.— On ilie action of light upon rhtoritl of 

 silver: On the use of the pri&m In qua'italive analysis, 263. — On ibe Dl^posiIiu^ of 

 Force in Paramagnetic and Diamagnetic Bodies, by Prof. Tvndall, K R S., '264.— On 

 M. Petitjean'a pn»cess for Silvering Glass, by Professor Faraday, D.C.L., F R.S., 263. 

 ■Some observanons on divided j:old, by Professor Farauav, D.C.L., F.R.S., 269, 



Mineralogy and Geology. — On the probable origin of some Magnesian Rooks, by T. 

 Stekry Huxt. 272. — Cidurids : Agalmaioiite, by Dr. C. T. Jackson; Corundum: 

 Slate rock of Hungary, 273. — Mules on the Bermuda Islands, by Am>iikvv gcott, 274. 



Note ou the Cherokiue of C. U. Shepurd, by T. Sterkv Host : Noiire of the occur- 

 rence of Aragonite near the Arkansas River, by VV. J. Tavlor : Descriplions of new 

 Species of Fo^si!a from the Cretaceous Formations of Nebraska, by Jamks Hall and 

 F. B. Mekk. 275.— Descriptions of new species of FoksiI.s from the Carboniferoui* Lime- 

 stones of Indiana and Illinois, by James Hall : On ihe Cretace(»as Fossils o[ Vancou- 

 ver's Island, Western America, by F. B. Mekk : Notes explanat(try of a Map and Sec- 

 tion illiiHtratrng Ihe Geological 5>iructure of the country bordering on the Missouri River, 

 from the mouih of the Piatie River lo Fori Benion, by Dr. F. V. Havdkn, 276. — DiJ- 

 Bcriprions of New Species and Genera of Fossils collected by Dr. F. V". Hayden in 

 Nebraska Territory in liSG : Norili Candina Mountains 277. — Himalayas : Noieci and 

 Queries on the drying up of the Yellow River, China, by D J. Macgowax, M.D., 278. 



A JSkeich of the Geology of Tennessee, by Richakd O. Currey : Devonian Trees : 

 Crinoid^, 280. 



