CONTENTS OF VOLUME XXXII. 



NUMBER I. 



Page. 



Art. I. General Remarks on the Temperature of the Terrestrial 



Globe and the Planetary Spaces ; by Baron Fourier, 1 

 II. Account of an Excursion to Mount Katahdin, in Maine ; 



by Prof. J. W. Bailey, - - ... - 20 

 III. Experiments on the Adhesion of Iron Spikes of various 

 forms, when driven into different species of Timber ; 

 by Prof. Walter R. Johnson, - - - - 34 

 iV. Remarks on the Natural order Cycadeae, with a descrip- 

 tion of the ovula and seeds of Cycas revoluta, "Willd. ; 



by A. J. Downing, 45 



V. On the Economical Uses of some species of Testacea, 53 

 VI. Notes on a Tour in France, Italy, and Elba, with a notice 



of its Mines of Iron ; by Prof. F. Hall, - - 74 



VII. Notes on Chemistry, &c. ; by Prof. J. W. Bailey, 85 



VIII. A Visit to the Salt Works of Zipaquera, near Bogota, 



in New Granada ; by J. H. Gibbon, M. D. - - 89 

 IX. Meteorological Journal, for the year 1836, kept at Mari- 

 etta, Ohio ; by Dr. S. P. Hildreth, - - - 95 

 X. Remarks on some of the Gold Mines, and on parts of the 

 • Gold Region of Virginia, founded on personal obser- 

 vations, made in the months of August and September, 



1836; by B. Silliman, 98 



XI. Notice of some facts connected with the Gold of a por- 

 tion of North Carolina; by Franklin L, Smith, Esq. 130 

 XII. Notice of the Shad and Shad Fisheries of the River Dela- 

 ware ; by Samuel Howexl, M. D. - - - 134 



XIII. Formic Acid — remarks upon its utility, together with a 



correction of Dobereiner's process and views respecting 

 the theory of its formation ; by Prof. J. P. Emmet, 140 



XIV. On the Identity of the Torrelite of Thomson with Co- 



lumbite ; by James D, Dana, A. M. - - - 149 



XV. On the Causes of the Tornado, or Water Spout ; by Prof. 



R. Hare, M.D. 153 



XVI. Description of Edwardsite, a new Mineral; by Prof. 



Charles Upham Shepard, M.D. - - - - 162 

 XVII. Description of a new Trilobite ; by Prof. Jacob Green, 167 



/7^^^7 



