CONTENTS OF VOLUME XXxXVI. 
=O -—— 
NUMBER I. 
Page. 
Art. I. Ascent of Mount Etna, February, 1832; by SipnEy 
L. Jounson, of the U. States squadron in the Medi- 
terranean, - - - - 2 g u 1 
II. Considerations upon the temperature of the terrestrial 
Globe; by M. Parrort, of St. Petersburg, “ 10 
III. An Enquiry into the Cause of the Voltaic Currents 
produced by the action of magnets and electro- 
dynamic cylinders upon coils and revolving plates ; 
by Prof. Joun P. Emmet, M.D. - = - 23 
IV. Motion of a system of Bodies; by Prof. THEopoRE 
STRONG, - - - - 44 
V. On the Navigation of Cape Horn; by M. F. Maury, 
Passed Midshipman U. S. Navy, - - 54. 
VI. Plan of an instrument fur finding the true Lunar Dis- 
tance; invented by M. F. Maury, Passed Midship- 
man U.S. Navy, - - - - 63 
VII. On the color of the air and of deep waters, and on 
some other analogous fugitive colors; by Count 
XavieR De Maistre, - - - 65 
VIII. The voice and its modifications, (more particularly 
Ventriloquism,) briefly considered; by Roser 
TOLEFREE, jt. - - - - 76 
IX. Meteorological Journal, kept at Marietta, Ohio, for 
the year 1833; by S. P. Hitpreru, - - 84 
X. Abstract of Meteorological Observations, made at 
Matanzas, (Cuba,) lat. 23° 2’ N., lon. 81° 36’ W., 
from Aug. 1, 1832, to July 31, 18383; by A.Mattory, 89 
XI. Physical Discovery—(Retrospective.)—The Magnetic 
Needle made to indicate the true north, and rendered 
more steady, by a newly invented magnetic process, 90 
XIE. On the Prairies of Alabama; by W. W. McGuire, 93 
XIII. Circulation in Vegetables; by Prof. E. Emmons, 99 
XIV. Notice of a Galvanometer; by Dr. Joun Locks, 103 
XV. A Parasite Tree; by Gro. W. Lone, Lieut. 4th Regt. 
U.S. Artillery, - - - 106 
XVI. Caricography ; Uy Prof. C. Dosen tains 107 
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