CONTENTS. V 



Page. 

 6, 7. Analysis of a new mineral, from Hoboken— Temperature 



of the atmosphere and of plants, &c. - - - 167 



8. Helvetic Society of Natural Sciences, - - - 168 



9. Determination of the time which a drowned person has been 



under water, ------- 170 



MECHANICAL PHILOSOPHY. 



I. Magnetic influence of the violet ray, - - - - 171 

 2,3. Iron works of Sweden — Calorific effects of the Voltaic pile, 173 



4. Electro-magnetic property of carbon, - - - - 175 



5. On the deflection of light, 176 



6. Preservation of firemen against fire and flame, - - 177 



7. 8. Plumbago instead of oil in watches and chronometers — 



Optical surgery, 179 



9. A remarkable watch, - - - - - - 180 



10. Magnetic influence of the solar beam, - - - 181 



STATISTICS. 



1, 2. Number of pupils in the universities of the Netherlands 



in 1827 — Peruvian geography and geognosy, - 182 



3. Revue Encyclopedique, ------ 184 



4, 5. Comparative number of books which appear in France 



and Germany — Vauquelin, ----- 185 



MISCELLANIES—FOREIGN AND DOMESTIC. 



1. Vegetable coloring materials in Canada, - _ . 186 



2. Phosphorescence of the sea in the Gulf of St. Lawrence, 187 



3. Antarctic expedition, ------- 188 



4. Gold and platina, 190 



5. 6. Rock crystals substituted for crown glass in making tele- 



scopes — On the temperature of the sea, - - 191 



7. Proceedings of the Lyceum of Natural History, of New York, 193 



8. Providence Franklin Society, - - - - - 195 



9. Circular scale of equivalents, - - - - - 196 



10. Notice of a locality of Arragonite, - - - ' - 197 



II. Thomson's scientific medals, - - - - 198 

 12, 13. Porcelain clay — Galvanic currents, - - 199 

 14, 15. Tennessee Meteorite — Rensselaer School Flotilla, 200 

 16, 17- Production of hydro-cyanic (prussic) acid, under uncom- 

 mon circumstances — Dr. Morton's paper, - - 201 



NOTICES OF RECENT AND FORTH-COMiNG SCIENTIFIC WORKS. 



Foreign. 



I. Arcana of Science and Art: or one thousand popular in- 

 ventions and improvements, abridged from the transac- 

 tions of public societies, and from the scientific jour- 

 nals, British and foreign, of the past year, (^1829.) 202 



Domestic. 



1, 2. American Ornithology — Encyclopaedia Americana, 202 



