CONTENTS. 
Page. 
Prof. J. Green on the Bald Eagle. : - “ 89 
Prof. S. L. Mitchell on the Proteus of the North-American 
Lakes, - - - = bee 
Prof.S. is Mitchell on the Mus enteral | L 183 
Prof. Jacob Green—F ragments relating to Animals, = 309 
PHYSICS, MECHANICS, CHEMISTRY AND THE ARTS. 
Mr. Minus Ward’s Alternating Steam-Engine, (with a plate 
No. IIT.) - - - - - - 
M. Girard on Navigable Canals, translated from the French 
by Mr. I. Doolittle, - - 102 
Dr. B. W. Dwight’s account ofa remiiecitl Storm - 124 
Dr. R. Hare on the Cause of Heat, - - tela: > ln 
Professor J. Dana on some morbid animal Products, = 749 
President Thomas Cooper, M. D. on Tests for Arsenic. 155 
Dr. T. D. Porter on the same, < - - 160 
Dr. C. Miller on the use of Phosphoric acid in Jaundice, 162 
Prof. J. Green’s account of a new Blow-Pipe, (with a figare,) 164. 
On the manufacture of Italian Bonnets, - - 166 
Notice of the Lithographic Art, - - 2 169 
Editor on the Tempest of Sept. Sp T8215 - - 171 
Editor on Natural Ice-Houses, : - - 174 
Editor on a singular Change in two Cannon Balls; - 178 
Prof. Robert Hare, M. D. account of an improved mode of sus- 
pending Gazometers, (with a figure,) - - 312 
Mr. Pearson’s patent domestic Telegraph, (with a plate,) 314 
Great Earthquake at Kutch, (Edin. Phil. Jour.) - 315 
Mr. Henry Seybert’s analysis of Sulphuret of stolybdenum, 320 
Mr. Seybert’s analysis of the American Chromat of Iron, 321 
Mr.G. T. Bowen’s et StS. of the Lake Erie Sulphat of Stron- 
tian, &c. - - =" 324 
Dr. J. L. Comstock on the Aphlonistit Lamp; - - 328 
Mr. Dearborn on a Natural [ce-House, - - - 331 
Mr. Ives on the same, - : i ie 
Mr. Ed. Hitchcock’s Metegrelosted! Foliroel kept at Deerfield, 333 
Dr. T. R. Beck’s do. at Albany. - - - - 338 
Mr. W. H. Denny on the cause of Goiire, - 339 
Dr. J. A, Allen on luminous appearances in the atmosphere, 341 
Letter of the Editor to Dr. Hare on his Galvanic Defla- 
grator, - - - - - 2 201 
MATHEMATICS. 
President Wm. Allen onthe Curves of Trisection. . 343 
