^ "S'-v.- H 



CONTENTS. 



GEOLOGY, MINERALOGY, TOPOGRAPHY, &c. 



Art. 1. On Earthqaafees— their Causes and Effects, by Isaac Lea, - 209 

 11. Au Account of the Earthquakes whi3h occurred in Sicily, in 



March 1823, by Prof. Ferrara, of Palermo, - - 216 



III. Remarks on the Moving Rocks of Salisbury, by Charles A. Lee, 23^ 



IV, Notice of ti^(S, Flexible or Elastic Marble of Berkshire County, 



by Prof. C. Dewey, - - 241 



V. An Account of some Now and Extraordinary Minerals discover- 

 ed in Wai wick. Orange Co. N. Y. by Samuel Fowler, M. D. 242 

 VI. Miscellaneous Localities of ■'Hnerals, - - - - 245 



"^'11. Geological Systems — Geological Maps — Chatoyant Feldspar, 



(Lxlractof Letters to the Editor from Mr. Maclure,) - 253 



BOTANY. 



Mill. Caricography, (continued,) by Prof. C. DeM'ev, - - 257 



IX. On the Botany of America, by W.J. Hooker, LL.D. F.R.S.E. 263 



ENTOMOLOGY\ 



X. On the Emigration of a Colony of Caterpillars, observed in 



Provence, by Jaraes Skene, Esq. . _ - - 284 



XI. Account of an Insect of the Cenns Urocerus which came out of 



the wood of a Table, by Mr. John Foggo, - - - 28fi 



ICHTHYOLOGY. 



XII. The Hr-dge-flog Ray. a ne%v species of Fish, by Samuel L. 



Mitehill, M.and LL. D. 290 



MATHEMATICS, MECHANICS, PHYSICS, AND CHEMISTRY. 



XIII. Remarks on Prof. Wallace's Reply to B. - - - - 293 

 >ilV. New Demonstrations on the theory of the Overshot Water- 



Whee!, by A. B. Quinby, - - - . - - 304 



XV. On high and low pressure Boilers, by A. B. Quinby, - - 313 

 XVf. On the Spiral of Archimedes, by A. B. Quinby, - - 316 



XVIi. Mr. Quinby on Crank Motion, in Reply to the Remarks of the 



Author of a Review in the North American, - - 2 IT 

 XVI il On the Action of Iron in Motion on Tempered Steel, by MM 

 Darier and Colludon, _ - . - - - 



XIX. Mr. Patten's Air Pump. 



XX. Analyses of several Minerals, by Prof. Gmelin, of the Universi 

 ty nf Tubingen, 



324 



327 



329 



XXI. OnLi,;>htning.Rods, by ,T<'remiah Van Rensselaer, M. D. - 331 



