11 CONTENTS. 



ART. PAGE. 



XL Some Account of the Character and Merits of the late 

 Professor Playfair 124 



XII. Biographical Memoir of the late Mr. James. 

 Watt 136 



XIII. A descriptive Account of the several Processes which 

 are usually pursued in the Manufacture of the Article 

 known in Commerce by the name of Tin Plate. By 

 Samuel Parkes, F.L.S., 8fc 141 



XIV. MISCELLANEOUS INTELLIGENCE. 



1. Mechanical Science. 



§ Astronomy, Navigation, Agriculture, Sfc. 



\. New Comets. 2. Steam Boats in America, 3. Fly in 

 Turnips. 4. On Ingrafting Trees. 5. Mildew in Wheat 

 prevented 151 to 154 



II. Chemical Science. 



§ 1. Chemistry. 



1. On Oxygenated Water, by M. Thenard. 2. Delphine, a 

 new Vegetable Alkali. 3. On the Action of Nitric Acid, 

 Chlorine, and Iodine, on Uric Acid, by M. Vauquelin. 4. 

 Persian Metallurgical Processes— ^Persian Method of 

 Purifying Silver; Manufacture of Steel in Persia. 5. 

 Process for obtaining pure Nickel. 6. Analyses of Coal. 

 7. Analysis of the Water of the Dead Sea, by M. Gay 

 Lussac. 8. Chesnut Wood substituted for Oak Bark. 

 9. Maple Sugar. 10. Preservation of Water at Sea. 

 11. Analysis of Sea Water. 12. Titanium in Iron Ores. 

 13. Chemical Prize Subjects. 14. Strength of iEtna 

 Wines. 15. On the Oxidation of Silver and Copper, 154 to 170 



I 2. Mineralogy, Geology, Sfc. 



1, Native Carbonate of Magnesia. 2. Analysis of the 

 ' Euclase, by M. Berzelius. 3. Skeleton of a Whale, 171 to 173 



III. Natural History. 



^ 1 . Botany, Zoology^, Sfc^ 



1 . Latitude of Trees in Sweden. 2. Simultaneous existence 

 of Salt and Fresh Water MoUusca, in the Gulf of Li- 



