CONTENTS. V 



FOREIGN. 



Page. 



21. Polytechnic Society of Paris, - - . . 191 



22. Geological Society of France, - ... 192 



23. Baron Ferussac's new work on Shells, - - - 193 



24. Epistilbite from Elba, - - - - - 194 



NECROLOGY. 



Baron de Zach, _-_ 194 



CHEMISTRY AND MECHANICAL SCIENCE. 



1. Electro-Magnetism, 196 



2. On the chemical action of magneto-electric currents ; by G, 



D. Botto, - - - 197 



3. Water Barometer, ...---. 198 



4. 5, 6.' Vegetable matter in Carnelian — Clay for sculptors — De- 



puration of all sorts of oil and of butter, - - 200 



NATURAL HISTORY. 



1. Thermal spring in the bed of the Rhone, . - - 201 



2. Geology, - - 203 



ASTRONOMY. 



1, 2. First observation of spots on the sun — Rotation of the plan- 

 et Venus, - 204 



DOMESTIC ECONOMY AND AGRICULTURE. 



1, 2, 3, 4, 5. Destruction of rats — Lute for bottling wine, &c. — 

 Artificial granite — Method of cleansing wool from its 

 grease, and economizing the residue — To prevent vines 

 from bleeding when trimmed or cut, - - - 205 



6. Valuable material for walks and alleys, _ . _ 2O6 



7, 8. Stucco for walls — Method of cutting glass vessels uniformly 



without cracking, ..._.. £06 

 9. Rice paper, - - 207 



HORTICULTURE. 



Notes relative to Garden Dahlias, . _ . _ 208 



MEDICINE. 



Use of milk in dropsy. 209 



STATISTICS. 



1. The Savings Bank of Geneva, 209 



2. Scientific premiums, - 210 



3. Population of England and Scotland, - - - - 211 

 New works in En<rland, - - - - - - 212 



