CONTENTS. 



XX. Ou Hybernation and other topics of Natural History ; by 



Judge Samuel Woodruff, ... 363 



XXI. Mode of drawing Ellipses ; by S. DeWitt, - 369 



MISCELLANIES .--FOREIGN AND DOMESTIC, 

 CHEMISTRY. 



I, 2. Preparation of pure nitrate of silver — Decomposition of 



the chloride of silver in the moist way, - - 370 



3, 4. Action of ether on sulphate of indigo — Memoir on starch, 371 

 5, 6. Action of potash on organic matters — To test the purity 



of chromate of potash, - - . _ _ 372 



7, 8, 9, 10. Use of mica in chemical analysis on a small scale — 

 Changes of volume in a mixture of alcohol and water — 

 Indelible coloring — Artificial ultramarine at a moderate 

 price, - - - .... 373 



II, 12. Opium — Combinations of azote, - - - - 374 

 13. New Febrifuge, - - 375 



MINERALOGY AND GEOLOGY. 



1. Analyses of Fer Titane of Baltimore, Maryland, - 376 



2. Mines of Freyberg in Saxony, - - - - - 376 



3. Water spout on the Lake of Geneva, _ - _ 377 



NATURAL PHILOSOPHY. 



1, Description of a Photometer, designed for comparing the 



splendor of the stars, 378 



2, 3. Optical properties of saccharine juices — New air pump, 379 



DOMESTIC ECONOMY AND THE ARTS. 



1, 2. Experiments on coloring matter for the purpose of dyeing 



or printing — Blowing of glass, .... 330 



3, 4. Pasteboard roofs — On saponaceous vegetables, - 381 



ANIMAL PHYSIOLOGY. 



Montyon premiums for discoveries in physiology, - - 382 



DOMESTIC 



1. Extract from the MS. of an unpublished narrative of travels 



and observations in South America, ... 332 



2. Details of an analysis of Danaite, a new ore of iron and 



cobalt, 386 



