CONTENTS OF VOLUME XXf. 
NUMBER I. 
Arr. I. Principles of Geology, - Fs és 
II. On some of the Vegetable Materials from which Cordage, 
Twine and Thread, are made ; by JAMES —— M. D., 
M. A. P. 
Ill. Experiments and Observations on ‘Narcotine and Sulphate 
of Morphine; “i sa Spire, M. D. Prof. Mat. Med. 
&c. in Yale Colle 
IV. Oncertain new Sexe Ca aves; by Mince: DE Sennes, Prof. 
of Geology, &c. at Montpelier 
¥. Zila for Potassium, &c. ; by L. D. Gate, M. D. Asst 
rof. Chem. in Coll. Phys. in hase York, 
Vi. Be Chloric Ether; by S. Guru - 
VII. On Central Forces ; by Prof. Tasasonl Srno 
VIII. Notice of the Vesicatng ee of Cantharides; by 
G. W. Carrenrer, 
IX. On the variable fapidity of action between water and hot 
iron; by Watrer R. Jounson, Prof. Mech. and Nat. Phil. 
in the Franklin Institute, Philadelphia, —- 
X. Electro-Magnetic Apparatus; by Bengsamin F. Tostay 
M. D., a lege 
XI. Notice of the Vaporization of Mercury in the fames of 
itric Ether—also, of various chemical Bir az by 
S. Gururie, 
XII. Geological Notices ; by Lieut. W. w. Maruen, ‘of the 
Mil. Acad. West Poi 
XIII. On North American Spiers by N. M. Hew, late Prof, 
in Uni N. Car 
XIV. On the Unicorn; by J Fr, _Lavennane, of Bordeaux. 
Translated by Jacos 
XV. Physical Geography ; trandtated from ‘the Bib. Univ. by 
f. Gri 1 
r RISCOM, 
XVI. Geological Egaivalents:; by Prof. Kunis Exon 
1 
XVII. we the oa He of Galvanic Ignition in Rock Blast- 
rrt Hare, M. D., Prof. Chem. Univ. Penn 
XVIII. Aeceat’ of ate Haden and Mohawk Rail =e" by 8. 
DeWirr Broopeoon, Cor. Sec. Albany Ins. 
MISCELLANIES.—FOREIGN AND DOMESTIC. 
CHEMISTRY. 
1,:%; one ong of lime; disinfection of dead bedies—Cement a 
uniting fragments of vessels and other objects, = - 
pet 
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