CONTENTS. iii 



4. Preparation of Nitric Ether, by M. Bouillon Lagrange. ^^^^ 



5. On the Animal Substances which generally accompany 

 Uric Acid in Calculi, by Dr. Gaspar Brugnatelli. 6. Pur- 

 puric Acid. 7. On the Decomposition of Chloride of 

 Silver by Hydrogen and by Zinc, by M. Farraday. 8. On a '. 

 peculiar Substance from the Thermal Waters of Ischia. 



9. On Gluten, and its Action on Guaicum. 10. New 

 Vegetable Alkali. 11. Acids of Arsenic. 12. Oxides of 

 Mercury. 13. Volatility of Oxide of Lead. 14. New Ace- 

 tate of Lead. 15. Purple Colour for Oil Painting. 16. Eco- 

 nomical Mode of rectifying Spirit of Wine. 17. Phos- 

 phoric Acid in Vegetables. 18. An Hydrated Carbonate 

 of Copper. 19. Explosion from Fire Damp. 20. Brittle- 

 ness of Glass. 21. Rotation of Camphor. 22. Effect 

 of the Sun's Rays on Magnetism. 23. New electrical 

 Battery. 24. New Wolfe's Apparatus. 2.5. New Method 

 of preparing the Purple of Cassius. 26. Fulminating 

 Gold. 27. Soda Alum. 28. On the conversion of Ligneous 

 Matter into Gum, Sugar, a particular Acid, and Ulmin 362 



IV, General Literature. 

 1. Grecian University. 2. Homer's Iliad. 3. Premiums 

 of the Highland Society of London. 4. Cambrian Society 

 inDyfed; Premiums for July 1820. 5. Prize Questions 

 6. Antiquities ogo 



XVIII. Meteorological Diary for the ; Months of Septera- 

 ber, October, and November, 1819 396 



A Select List of New Publications , 397 



Index. 



