CONTENTS. iii 



PAGB 



II. Ghbmical Sciencb. 



1. On Paratonnerres, or Conductors of Lightning-. 2. Influence 

 of Copper, &c., on Magnetic Needles. 3. Intensity of Electrodyna- 

 mic force. 4. Variation of boiling'-points ; increased production of 

 Vapour. 5. Oersted on accelerating- distillation. 6. Maximum 

 density of Water. 7. On the substitution of tubes for bottles, iu the 

 preservation of certain fluids. 8. Supports for substances before the 

 blow-pipe. 9. Examination of fused Charcoal. 10. Silenium in An- 

 glesea pyrites. 1 1. Alloy of Antimony and Potassium first produced 

 by GeoiFroy. 12. Composition of Crystals of Sulphate of Soda. 13. 

 Use of Chloride of Calcium as a Manure. 14. Separation of Stron- 

 tia and Baryta. 15. On Combinations of Carbon and Iron, pig- 

 iron, &c. 16. Massive copper obtained by the moist process. 17. 

 Ammoniacal Chromate of Copper. 18. Artificial Crystals of Chro- 

 mate of Lead. 19. Compound of Muriate and Hydro-sulphuretted 

 Oxide of Antimony. 20. New Mineral, Titaniferous Cerate. 21. 

 On Chloride of Titanium. 22. Pescbier on Titanium in Mica. 23. 

 Wohler on a Compound of Cyanuret and Nitrate of Silver. 24. Sul- 

 phates of Cinchonia and Quinia. 25. Parilline or Salifiable base 

 of Sarsaparilla. 26. Experiments on Civet. 27. Composition 

 of deoxidized and of Common Indigo. 28. Decolouring power 



of different Substances. ^. Prize Questions. . . . 143 



III. Natural History. 



1. Antiquity of Trees. 2. Red Snow of the Alps. 3. Artifi- 

 cial Production of Pearls. 4. Permanency of Human Hair. 5. M. 

 Peschier on the Cure of the Goitre. 6. On Digestion in Rumina- 

 ting Animals. 7. White and Household Bread. 8. Properties of 

 Margosa Oil. 9. Quantity of Rain which falls at different heights. 

 ID. Temperature on the Earth's surface. 11. Heights of Mont 

 Blanc and Mont Rosa. 12. Medicinal Application of Leeches . 166 



XV. Meterological Journal for the Months of December, January, 

 and February, 1824-5. . . 176 



ERtATUM.— In Hutton's Tables, 8. Lend. Igfi2. P. 317. N. 75843 ; fur 9255, 



read 9155. 



