CONTENTS. hi 



ART. PAGE 

 Male Fern Root. 14. Oil of Dahlia. 15. Crystallization of Bitumen. 

 16. EflFect of Light on Colour of Socialite. 17. Cleaning of Gold 

 Trinkets. 18. Action of Nitric Acid on Charcoal. 19. Camelion 

 Mineral. 20. Concentration of Alcohol by Bladders. 21. Pure 

 Hydrogen— Properties of Amalgam of Zinc. 22. Coating for Spe- 

 cula. 23. Castorina, a new Animal Substance. 24. Strength of 

 Chloride of Lime, or Bleaching Powder 169 



in. Natural History. 



1. Aurora Borealis in Iceland. 2. Drosometer: Annual quan- 

 tity of Dew. 3. Rain Guage. 4. Mountain Tallow. 5. Aberthaw 

 Limestone. 6. Analysis of the Holy- Well Water, near Cartmell, 

 Lancashire, by J. C. Woolnorth, R.N. 7. Eruption of sulphuretted 

 hydrogen. 8. Ammonite containing Shells. 9. Analysis of a Cal- 

 culus, by M. Laugier. 10. New Method of destroying Calculi. 

 11. Effects of Lightning on the Human Body. 12. Exhalation of 

 Water during Respiration. 13. Prize Questions proposed by the 

 Royal Academy of Sciences. 14. Geographical Prizes. 15. Erup- 

 tion of a Mud Volcano in Sicily 185 



Society of Physicians 194 



XIVo MeteorologicalJournal . . . ; 197 



^S 



