rONTENXS. 



II. Chemical Science. 



1 . Permeability of Iron to Tin. 2. Granulation of Copper. , 

 3. Selenium. 4. Chromic and Sulphuric Acids. 5. Native 

 Carbonate of Magnesia. 6. On Compounds of Sulphur with 

 Cyanogen. 5. Sub-sulphate of Alumina and Potassa. 8. 

 Analysis of Verdigris. 9. Analysis of Gunpowder. 11. On 

 Firing of Gunpowder by Electricity. By M. Leuthwaite. 

 1 1 . Use of Chromate of Lead as a Dye. 12. Porcelain Glaze. 



13. On Preventing the Ravages of Moths in Woollen Cloths. 



14. Decomposition of Blood. 15. Diod Griafol. 16. Forma- 

 tion of Alcohol, byFluoboric Gas. 17. On the Ripening of 

 Fruits. 18. Crystallization of Sugar. 19. Cathartine, the 

 active Principle of Senna. 20. Piperin the active Princi- 

 ple of Pepper. 21. On Phosphorescence. 22. Dr. Ure on 

 Alkalimetry and Acidimetry. 23. Singular Properties of 

 Boracic Acid. ... 385 



III. Natural History. 



§ Geology, Medicine, Sfc. 



1. Further Remarks on the resemblance between certain 

 Varieties of Granite and of Trap. By Dr. Mac Culloch. 

 2. On a Deposition of Carbonate of Lime in Wood. 3. 

 Breaking out of a Spring. 4. New Volcano. 5. Use of 

 Hartshorn in Intoxication. 6. Scarlet Fever. 7, Iodine, 

 on its application as a Medicine. 8. Medical and Physiolo- 

 gical Prize Questions 404 



IV, General Literature. 



1. Origin of Vegetables. 2. New Longitude Act. 3. 

 Roman Mint. 4. Antient Roman Altar. 5. Druidical 

 Sepulchre. 6. Literary Notices 411 



XVIII. Meteorological Journal 413 



Select List of New Publications 414 



Index 



