vi CONTENTS. 
‘a Page. 
. On the Geological Position of the Mastodon giganteum and 
associated Fossil Remains at Bigbone Lick, Kentucky, 
and other localities in the United States and Canada ; ” 
Cuas. Lyett, Esq., V. P. G.S., &c., 
XIV. On the a of Forces; by Prof. dekestiia C. 
TWINING, : 
. Notice. of an Ice Motantean in Wallingford, Rutland Cetin 
ty, Vermont; by S. Peart Larnrorp, M.D., = - - 331 
XVI. Views concerning Igneous Action, chiefly as deducell from 
the Phenomena presented by some of the Minerals and 
Rocks of the State of New York; Py Prof. Lewis C. 
Beck, M. D., - f 
XVII. On the possible Variation in ihe Ceiageh of ths hays or of , 
the Times of Rotation of the Earth ~ its Axis ; Py 
Prof. W. W. Marner, - 
XVIII. An Account of some new caomcnaa and aeons for 
the Analysis of the Carbonates; by Profs. Wituiam B. 
Rogers and Rozsert E. Rogers, - 
xix Description and Analysis of Piskerinaiaals a native 0 Mag 
nesian Alum; by Aveustus A. Haves, - 360 
XX. System of Mineradagy, including the most Reoem Dis- 
coveries, Foreign and American; by James D. Dana, 362 
XXI. Abstract of the Proceedings of the Thirteenth Meeting of 
the British Association for the Advancement of Science, 388 
X 
= 
m4 
<j 
MiscetLanies.—Analysis of Meteoric Iron from Otsego County, 
New York, 401.—Improvements in Cambridge, England, 403. 
—Association of American Geologists and Naturalists: New 
Works received, 404. 
Avrenpix.—Reyiew of and Strictures on Mr. Dana’s Reply to Mr. 
Couthouy’s Vindication against his charge of Plagiarism ; by 
Joserx P. Cournouy, 1,—Reply of J. D. Dana to the fore- 
going article by Mr. Couthouy, 10. 
Fi 
