roNTENTS. Ill 



PAGE 



6. Oil Gas. 7. Purification of the Water of the Seine at 

 Paris. 8. Preservation of Steel Goods. 9. Preservation 

 of Eggs. 10. Fusible Metal and its Application. 11. 

 Composition for Moulds. 12. Cement. 13. Hyalograph. 

 14. Black Lead Pencils 421 



IT. Chemical Science. 



§ 1. Chemistry. 



1. On the Chemical Phenomena of Thin Plates. 2. Effect 

 of Heat on the Colours of the Ruby. 3. Pyrometer. 4. 

 Source of Cadmium. .5. Crystallized Gold. 6. Stanniuretted 

 Hydrogen. 7. Deutoxide of Copper. 8. Preparation of 

 Kermes Mineral. 9. Sodo-cyanuret of Potassium and Mer- 

 cury. 10. Hydriodate of Carbon. 11. Fromic acid and 

 Formate of Lead. 12. Dilated Caoutchouc Bottles. 13. 

 Prize Question 426 



§ 2. Electricity, Mayneti&m, Sfc. 



14. Pyro-Electricity of Minerals. 15. Electricity of the 

 Atmosphere. 16. Electrometry for Minerals. 7. Remark- 

 able Luminous Phenomena. 18. Terrestrial Magnetism. 

 19. Intensity of the Magnetic force in different parts of 

 the World. 20. Magnetism affected by Earthquakes . . 430 



III. Natural History. 

 § I. Mineralogy, Geology, Meteorology, Sfc, 



1. Analysis of Yellow Copper Ore, by Mr. Phillips. 

 2. Native Carbonates of Magnesia. 3. Native Chromates 

 of Iron. 4. Hydrate of Alumina. 5. Native Hydrate of 

 Soda. 6. Recent Iron Pyrites. 7. Remarkable Glaciers, 

 containing organic remains. 8. Cave containing rattle- 

 snake skeletons. 9. Meteors. 10. Analysis of the Me- 

 teorolite of Juvenas. 11. Volcanoes in Iceland. 12. Vol- 

 canoes in the North. 434 



§ 2. Medicine. 



13. Proper State of Prussic Acid for Medicinal use. 14. 

 Oil of Turpentine rendered palatable. 15. Hooping Cough. 

 16. Large Human Calculus. 17. Physiological Prize 

 Questions. 18. Medical Prize Questions. 19. Astrono- 

 mical Prize Questions. 20. Prize Questions — College of 

 Surgeons 440 



XIX. Meteorological Journal for the Months of March, 



April, and May, 1822 443 



