11 CONTENTS. 



Art. Page 



XIII. Account of the good Eflfects of the White Oxide of 

 Bismuth in a very severe Stomach Affection of a Gentle- 

 man far advanced in years. By G. D. Yeats, M.D., 

 F.R.S., Fellow of the Royal College of Physicians, Sfc. 295 



XIV. On a New Hygrometer, which Measures the Force 

 and Weight of Aqueous Vapour in the Atmosphere, 

 and the corresponding Degree of Evaporation. By 



J. F. Daniell, Esq., F.R.S., and M.R.I 298 



XV. Proceedings of the Royal Society 337 



XVI. Proceedings of the Horticultural Society 339 



XVII. Miscellaneous Intelligence, 



I. Mechanical Science. 



§ 1. Astronomy, Agriculture, the Arts, &c. 

 1. Prize Questions for 1820. 2. Rate of Increase in the 

 Vegetation of Wheat. 3. New Stop Cock, for Pneumatic 

 Apparatus. 4. Substitute for a Copying Machine. 5. Dry Rot 

 prevented. 6. Ancient Seeds. 7. Smut in Wheat prevented. . 345 



II. Natural History. 



§ 1. Mineralogy, Geology, Meteorology, 8^c. 



1. Mineralogical Notices, &c. 2. Boracic Acid. 3. Mag- 

 netic Iron Ore. 4. Analysis of the Wavellite. 5. Fossil Ani- 

 mal Remains. 6. Lignite. 7. Royal Geological Society of 

 Cornwall. 8. Earthquakes. 9. Scintillating Limestone. 10. 

 Native Lead and Cinnabar, in America. 11. Aurora Borealis 349 



§ 2. Medicine, Anatomy, Sfc. 

 1. New Mercurial Ointment. 2. Method of preparing Ex- 

 tracts. 3. Urinary Concretion in a Pipe. 4. Prize Question. 

 5. Medical Prize Question. 6. Remedy for Hydrophobia.. 358 



III. Chemical Science. 



§ Chemistry, 



1. Researches on the colours acquired by Metals when 

 heated. 2. Analysis of Mixtures of the Chlorides of Potas- 

 sium and Sodium. 3. Discovery of Pyroligneous Acid. 



