CONTENTS. 
Qiiartzose Tubes of the Senner Heath. 25. Geognos- 
tical Situation of Topaz in the vicinity of Villa Rica 
in Brazil. 26 . Mineral Riches of the Capitania of Minas 
Geraes in Brazil. 27* Annual quantity of Salt raised 
from the bowels of the Earth in Europe. 28. Titanitic 
Iron-ore not confined to Volcanic Districts. 29- Sepia 
Colour from Peat, - - 188 
Zoology. 80. Spines on the Wings of Birds. 81. Patella 
distorta of Montagu. 82. Marine and River Mollusca 
in the Gulf of Livonia. 88. Silk of the Pinna marina. 
84. Lepus variabilis or varying Hare. 85. Canary Bird 
without Feathers, - - 190 
Botany. 86. New Siliceous grass. 87* Germination of 
the Musci, - - 192 
IV. GENERAL SCIENCE. 
88. George Bidder. 89- New Society of Arts in Edin- 
burgh. 40. Method of taking Impressions of Gems and 
Seals in Shell-lac. 41. Glass from Straw. 42. Experi- 
ments on the Colour of Minerals. 48. Effect of Heat 
on Obsidian. 44. Bottle thrown out of the Isabella. 
45. Earthquake at Lisbon on the 2d February 18l6, 
46. Expedition overland from LIudson’s Bay to the shores 
of the Arctic Ocean. 47. Utility of the Marine Ba- 
rometer, or the Sympiesometer, in indicating approach- 
ing Storms. 48, On the Employment of Steam-Vessels 
for distant Voyages. 49* Plants impregnated with Car- 
bonate of Lime mistaken for Coral. 50. Wine from the 
Arbutus Unedo. 51. Map of Iceland. 52. Charts of the 
Baltic. 58. Greatest Waterfall in Europe discovered in 
Lapland, - - 198 
Art. XXXVI I L List of Patents granted in Scotland since 
the 11th September 1819, 
199 
