CONTENTS 



4 



Page. 



AiiT. I, Of the Phenomena and Causes of Hail Storms. By 



Professor Demson Olmsted, - - - . l 



II. Architecture in the United States, - - ^ - 11 



III. Sketch of a Classification of the European Rocksj by 



Henry T, De la Be( he, Esq. F. R, S. ^c. - - 26 



IV. On the Rectification of the Ellipse j by C. Wilder, 38 



V. Notices and Observations on the American Cicada, or 



Locust ; by Dr. S. P. Hildreth, * • ^ - 47 



VL The Gold of the Carolinas in Talcose Slate; by 



50 



VII. On the Office of the IVitrogen of the air, in the process - 



of Respiration ; by Prof Lewis C. Beck, M D. - 52 

 VIII. Notice of Animalcules in Snovv; by Dr. Joseph E. 



1^ Prof. Eaton, 



Muse, 



XJX. On the Sulphate of Strontian, Kingston, (U. C); with 



notices of the Geology of the vicinity; by Lieut. 



56 



c; 



8 



IX. The Iodide of Potassium, (Hydriodate of Potassa of 



the shops,) as a test for Arsenic; by Prof J. P. 



Emmet, Univ. Virgin. 

 X. On the Dew Point; by A. A. Hayes, - - - €3 

 XI. On the cause of the peculiar aspect of the air, in the 



Indian Summer, . - - , - - 55 



XII. Solution of a Problem in Fluxions; by Prof. Theo- 

 dore Strong, -..-.--67 



XIII. On capillary attraction; by Prof Theodore Strong, 70 



XIV. Particulars respecting an irised Aurora Borealis; by 



James Bowdoin, Esq. ------ 72 



XV. Notice and description of a Marine Ventilator; by 



Samuel "Whiting, -----•• 75 



XVI. Notice of some Localities of Minerals, near Baltimore, 



Md- ; by Philip T. Tyson. With an Appendix, by 

 C. U. Shepard, -«.-.- 73 



XVII. On the Crystalline Form of Iodine ; by Lieut. W. W. 



Mather, Assist. Prof, of Chem. and Min. U. S. Mil. 

 Acad. W. P. 84 



XVIIL On the Transition Rocks of the Cataraqui; hy Capt. 



R. H. Bonnycastle, R. E. Canada, - ^ - 85 



BAVDELEYf 



104 



