CONTENTS. iii 



Page 

 Art. XXVII. Colours which different Substances communicate 

 to the Flame of the Blowpipe. By M. Buzen- 



GEIGER, _ . - - 341 



XXVIII. Description of several New or Rare Plants which 

 have flowered in the neighbourhood of Edin- 

 burgh, and chiefly in the Royal Botanic Gar- 

 den, during the last three months, - 344 

 XXIX. Celestial Phenomena from October 1. 1829 to 

 January 1. 1830, calculated for the Meridian of 

 Edinburgh, Mean Time. By Mr George 

 Innes, Aberdeen, - - - 351 



XXX. Scientific Intelligence. 



NATURAL PHILOSOPHY. 



1 . Influence of Electricity in the Formation of certain Inorga- 

 nic Bodies. 2. Metallic Electricity. 3. Influence of Me- 

 teorological Phenomena on Dry Piles, - - 354-9 



METEOROLOGY. 



4. Remarkable Coldness of the late Spring. 5. Changes of 

 Climate at Sheraz. 6. Effects of the Aurora Borealis on 

 the Magnetic Needle. 7. A Storm in the Mediterranean, 

 accompanied with Castor and Pollux Lights, - 360-2 



CHEMISTRY. 



8. Thorine, a new Earth, _ _ - 363 



MINERALOGY. 



9. Notice respecting the presence of Websterite in the Plas- 



tic Clay of Auteuil, near Paris ; by M. Brongniart. 10. 

 Talc and Mica. 11. Native Sulphuric Acid. 12. Disco- 

 very of Iodine in an Ore of Zinc. 13. Inquiries into the 

 Structure of Bodies which Crystallize regularly. 14. 

 Glassy Felspar, now called Ryakolite, - - 363-6 



15. Discovery of Iodine and Bromine in certain Salt-springs 

 and Mineral- waters in England. l6. Examination of a 

 Limestone Deposite, by M. Vauquelin. 17- Bones of 

 Palaeotheria discovered in a bed of the coarse Limestone 

 Formation, near Paris. 18. Caves containing Human 

 Bones, - - - - 366-8 



