CONTENTS. vii 
ASTRONOMY AND MECHANICAL SCIENCE, 
Page. 
1, 2. Biela’s comet—Observatory of Geneva, - 390 
3, 4, 5. Medal for discovery of Consete Mi aiitnaeit density of 
water—On the simultaneous motions of a ee and 
the surrounding air, - - - - 391 
AGRICULTURE AND DOMESTIC ECONOMY. 
1. On the cultivation of beets and the manuiactory of sugar, 392 
2. Relative values of different kinds of food for sheep, . 393 
DOMESTIC. 
1. Professor Jacob Green’s Monograph of the pe of 
~~ North America, with colored models of the speci 
2. The Herbarium of the late Zaccheus Collins of Philadelphia, 398 
3. The coal beds of Pennsylvania equivalent to the ae secon- 
: dary coal measures of Europe, - 
4. Correction of an error in Prof. Green's Sic of North - 
American Trilobites; with additional explanations, 400 
5. Caution addressed to manufacturer and. venders of inf amma- 
ae SI es olatile, 
Sets  eeeenc - 402 
7, 8. Manufacture of ba ae be Phosphate of Lie in 
Edenville, N. Y., 403 
9. Geological Map, 404 
10, 11, 12. Fossil Shells of the Tertiary Formutlodé of the Uni- 
"ted States—Anthracite in Wrentham, Mass.—Comparison 
of weights and measures of length and capacity, reported 
to the Senate of the United States 2 the seer sh De- 
partment in 1832, - - 405 
13. Revised editions of Spurzheim’s Works, cates. — 406 
