CONTENTS OF VOL. VI. 



GEOLOGY, MINERALOGY, TOPOGRAPHY, &c. 



Page, 



Geology, Mineralogy and Scenery, of the Connecticut, with a geolo- 

 gical map and drawings of organic remains, by the Rev. Edward 

 Hitchcock, A. M. --.... i 



A memoir on the Topography, Scenery, Mineralogy, &c. of the Catts- 

 kill Mountains, by James Pierce, Esq. - - - - 86 



Speculative Conjectures on the probable changes that may have occur- 

 red in the regions east of the Stony Mountains, by William Mac- 

 lure, Esq. ....-.- 98 



Geology, Mineralogy, and Scenery of the Connecticut, with a geological 

 map and drawings of organic remains, by the Rev. Edward Hitch- 

 cock, A.M. ....... 201 



Notice of the Alluvial District of New-Jersey, with remarks on its agri- 

 culture, by James Pierce, Esq. . _ . . 237 



On the probable origin of certain Salt Springs, by Prof. Amos Eaton, 242 



On a Rocking Stone in Durham New-Hampshire, by Jacob B. Moore, 

 with a plate, No. 10, ----- - 243 



Miscellaneous Localities of Minerals, communicated by various persons, 245 



1. By Professor J. F. Dana, of Hanover, N. H. ... 245 



2. By Mr. Steuben Taylor, of Providence, R. I. ... 245 



3. By Dr. Jacob Porter, - ... . . 246 



4. By Mr. T. Stuart of Peacham, Vermont, ... - 249 



5. By Dr. W. Langstaff, 250 



6. By J. P. Brace, 250 



Notice of a curious Water Fall, and of Excavations in the rocks, by 



Professor Hall, ------ 252 



BOTANY. 



Rev. Edward Hitchcock, on a new species of Botrychium, with a 

 drawing, - . - - . - . 103 



Professor S. L. Mitchill and Dr. John Torry, on a new species of Usnea 

 from New South Shetland, with a drawing, .... 104 



On the Diversity of the two sorts of Datura found in the United States, 



by Dr. William Tully, 254 



CONCHOLOGY. 



Mr. D. H. Barnes on the Genera Unio and Alasmodonta, with eight 

 plates of the shells, _......- 107 



Mr. D. H. Barnes on the Genera Unio and Alasmodonta, with two 

 plates, Nos. 11 and 12, - - - - - 258 



« MATHEMATICS. 



Demonstration of a Problem in Conic Sections, by Assistant Professor 

 Davies, 280 



Review of the Cambridge course of Mathematics — continued— Ele- 

 ments of Geometry, by A. M. Legendre, Member of the Institute, &c. 283 

 PHYSICS, CHEMISTRY, MECHANICS AND THE ARTS. 



Mr. Isaac Orr on the formation of the Universe, with diagrams, - 128 



Dr. James Cutbush on the formation of cyanogene or prussine, in some 

 chemical processes, not heretofore noticed, . - . . 149 



Mr. Henry Seybert's analysis of manganesian garnet, with a notice of 

 Boric acid in tourmalines, ..... 155 



Dr William Meade's letter, with an account of a ti'a veiled stone, — co- 

 pied from the transactions of the Weruerian Society of Edinburgh, 15$ 



Professor Cleaveland's notice of some remarkable ballsof snow, - 162 



Professor J. F. Dana's miscellaneous notices, - - - 163 



