INDEX. 



159 



Tabasheer, account of the chemical exper- 

 iments on, 1, 136, 144, 155. 



Tea, improved method of making, 87. 



Tear, analysis of a, 147. 



Tennant, Smithson, discovery of plomb 



gomme, (J7. 

 experiments of, 56. 



Theory of formation of Kirkdale Cave, 

 103. 



Thomson on ulmin. 47. 



Tin, capillary metallic, 74. 



Tomb of King Psammis, specimen from, 

 102. 



Topaz, experiments with, 96. 



Tours of Smithson, 139, 140. 



Tungstic acid, test of, 85. 



Turnsol, coloring matter of, 69. 



Ulmin, substance from elm tree, 47, 130. 



Vauquelin on zeolite, 42, 46. 

 Vegetables, coloring matter of, 58. 

 Vesuvius, analysis of matter from, 89. 



saline substance from, 52, 130. 

 Violet, coloring matter o GO. 

 Volcanoes, 53, 130. 



Watt, Gregory, on basalts, 127. 

 Wax lamps, 79. 

 Werner on minerals, 90. 

 Wicks of lamps, 78. 



Works and character of Smithson, J. R. 

 McD. Jrby, 143. . 



Zeolite, composition of, 42, 129, 145. 



