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CONTENTS. VU 



Page 



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. 



372 



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, - 



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, - - - .... 375 



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 



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, - 380 



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 of an unpublished narrative of travel* 



and observations in South America, - - - 382 



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



cobalt, 



386 





