%, 
CONTENTS OF VOLUME XXIII. 
NUMBER I. 
Pag 
Arr. I. Geological and Mineralogical Account of the Mining Dis- 
tricts in the State of Georgia—western part of North 
Carolina and of East ———— with a _— by Hon. 
Judge Jacos Prcx, 
il. On the temperature and Saas of the ‘Waters of the 
Ocean at different depths, 
Ili. Note on the Progressive ican of  Pemperatare be- 
neath the surface of the Earth 
IV. Universal Terms—Disputes sey ite Gai aga their 
Causes ; by Emma 
VY. On the action of the second pics of icqeparens plates 
osha ht; by Day Brew LL. D. F.R.S. 
Vis Hail Storms < mg ° ee 
eorgia 
VIL. ipeorement in Field Scion: 
VIII. On the Origin, Extension and Conitnasode of Prairies ; ; 
: by Dr. Rusu Nutt, of Rodney, State of Mississippi, 
IX. Observations on depriving Flowers of their Anthers, to 
produce Double Flowers; by E. T. Lerrner, - 
X. Miscellaneous Geological Topics relating to the lower 
part of the vale of the eh ; by Dr. Rusa ues 
of Rodney, Mississippi, 
XI. Notice ofa ai a American Utensil; by Prof. Wiis 
R. Joun 
XII. heaake’s on ae Strength of Cylindrical eeam Boilers; : 
by Prof. Warrer R. Jonson, 
XU. A one sae of Dr. Wollaston’s Reflective ere 
by R. Graves, Jr. Civil Engine 
XIV. bat a the Plants of Chile; ccaikiad Son the “ ee 
curio — ” WS. W. ee M. D. 
U.S. Navy, 
XV. = otice of a Somiats of Petroleum, called the oil il Spring. 
XVI. Notice of Wood's pking Maching noe - 
XVII. Observations on Inclined Planes; by J. Tuonsor, - 
715 
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