Vi CONTENTS. 



Page. 

 XII. Notice of a Cetaceous Animal supposed to be new to 



the American coast ; by William Sampson, - 301 



XIII. Documents in Commemoration of Baron Cuvier, - 303 



XIV. Notices of American Steam Boats ; by W. C. Redfield, 



of New York, 311 



XV. On the Economy of Fuel with reference to its domestic 

 applications ; by Walter R. Johnson, Prof, of Mech. 

 and Nat. Phil., Franklin Institute, Philadelphia, 318 



XVI. The Rattle Snake disarmed by the leaves of the White 



Ash ; by Judge Woodruff, . . _ _ 337 



XVII. On some new Fossil and Recent Shells of the United 



States ; by T. A. Conrad, - - - - 339 



XVIII. Report on the Filter and Prepared Charcoal of M. Du- 



mont ; by Franklin R. Smith, of Philadelphia, - 346 

 XIX. Notice of Prof. Olmsted's Introduction to Natural Phi- 

 losophy, for the students in Yale College, - 351 

 XX. Obituary Notice of Dr. Gaspar Spurzheim, - - 356 



miscellanies. — foreign and domestic. 



necrology. 



1. Notice of the deaths of eminent men, - - - - 370 



2. Sketches of the lives of Louis Simond and Charles-Victor 



Bonstetten, 371 



chemistry. 



1. Combinations of carburetted hydrogen, _ - . 377 



2, 3. Separation of the protoxide from the oxide of iron — Nar- 



ceine, a new substance discovered in opium, - - 379 



4. Meconine, 380 



5. Effects of the thermo-multiplicator, - - - - 381 



6. 7. Oxygenated water — Two chlorides of sulphur, - 382 

 8, 9. Density of the vapor of sulphur and of phosphorus — Pres- 

 ervation of substances by means of alkalies, - - 383 



10, 11. Crucible for fusion — Researches relative to the azote 



formed in animal substances, _ - _ _ 334 



12. Process for silvering copper so as to polish, - - 386 



13, 14. Glass syphons for transferring corrosive fluids — Carbon- 



ate of lime and its compounds, - - _ - 387 



1. New cave of bones, - - - - - - - 388 



2. Notice of Prof. Hitchcock's Report on the Geology of Massa- 

 chusetts, -.....=.. 389 



