IV CONTENTS. 



Page, 

 4,5. Powder Mills — New Phenomena of Vapor, - 1G1 



6, 7. Preparation of Blacking — Preservation of Alimentary 



Substances, - - - - 163 



8, 9. Education in Hungary — A Colony formed of twelve 



Boys, 165 



10. Necrology, De La Place, - - 166 



11. La Rochefoucauld, Liancourt, - 167 



12. On the action of Alkaline Chlorides, as the means of dis- 



infection, .... - 169 



13. 14, 15. Magnetism of the Solar Rajs — Metallic refriger- 



ating Mixture — Chinese Paper, - - 171 



16, 17. Useful Alloy — Micrometrical observations on Saturn, 

 Jupiter, and his Satellites, made at Dorpat, with the 

 large Achromatic Telescope of Fraunhofer, 172 



18, 19. Mutual Instruction in Denmark — Separation of Iron 



from Manganese, - 173 



20, 21, 22, 23. Action of Anhydrous sulphuric acid on fluor 

 spar — Disinfection of" Alcohol — Mosaic Gold — Solu- 

 tion of Copal, - - - 174 



24, 25,26. Pyroligneous Acid — Crystallization of Camphor — 



Animal Magnetism, - - - 175 



27, 28. Preparation of Soda from the Sulphate of Soda — 



School of Arts, - - - 176 



29 Battle of Ants, - - - - - 177 



" Action of Barytes, Strontian, Chrome, &c. - 178 



30, 31, 32. New Agricultural and Manufacturing Establish- 

 ment in France — Chlorate of Lime— Theory of 

 Flame, ----- 179 



33. Power of Steam, - - - - 180 



34, 35. Cyanuret of Iodine — Ammonia in the rust of Iron, 181 

 36, 37. Improved Clock — Neuchatel, - - 182 

 38, 39. Necrology, Pestalozzi — Progress of Science, - 183 



40. Comparative Analysis of Olivine and Crysolite, 184 



41, 42. Anhydrous Sulphate of Soda — Identity of Epistilbite 



and Heulandite, - - - - 185 



43, 44, 45. Separation of Elaine from Oils — Oxide of Carbon 



— Enormous Fossil Vertebra, - - 186 



46, 47. Phosphorus in Kelp — Bismuth Cobalt Ore, - 187 

 48, 49, 50. Experiments on certain Oxalates — A method of 

 facilitating the observations in Geodoetical opera- 

 tions — Magnetic influence in the Solar Rays, 188 

 51, 52, 53. 54. Compression of Water, by high degrees of 

 force, and Liquefaction of Atmospheric Air — Culti- 

 vation of Plants in Moss — Strength of Bone — Olbers 

 on the Comet of short period, - - 189 

 55, 56. Monochromatic Light — Volcanos, - - 190 



