VI CONTENTS. 



Page. 



On a Native Compound of Sulpliuret of Lead and Arsenic . 65 

 Thomson's Annals of Philosophy, Vol. XIV, 1819, p. 96. 



On Native Hydrous Aluminate of Lead or Plomb Gomme . 67 

 Thomson's Annals of Philosophy, Yol. XIV, 1819, p. 31. 



On a Fibrous Metallic Copper ...... 68 



Thomson's Annals of Philosophy, Yol. XYI, 1820, p. 46. 



An account of a Native Combination of Sulphate of Barium 



and Fluoride of Calcium 71 



Thomson's Annals of Philosophy, Yol. XYI, 1820, p. 48. 



On some Capillary Metallic Tin 74 



Thomson's Annals of Philosophy, Yol. XYII ; New Series, 

 Yol. I, 1821, p. 271. 



On the Detection of very Minute Quantities of Arsenic and 



Mercury ......... 75 



Thomson's Annals of Philosophy, Yol. XX; New Series, 

 Yol. IY, 1822, p. 127. 



Some Improvements in Lamps ...... 78 



Thomson's Annals of Philosophy, Yol. XX; New Series, 

 Yol. IY, 1822, p. 363. 



On the Crystalline Form of Ice 80 



Thomson's Annals of Philosophy, Yol. XXI ; New Series, 

 Yol. Y, 1823, p. 340. 



A Means of Discrimination between the Sulphates of Barium 



and Strontium 81 



Thomson's Annals of Philosophy, Yol. XXI: New Series, 

 Yol. Y, 1823, p. 359. 



On the Discovery of Acids in Mineral Substances . . 82 



Thomson's Annals of Philosophy, Yol. XXI ; New Series, 

 Yol. Y, 1823, p. 384. 



An Improved Method of Making Coffee .... 87 



Thomson's Annals of Philosophy, Yol. XXII ; New Series, 

 Yol. YI, 1823, p. 30. 



A Discovery of Chloride of Potassium in the Earth . . 89 



Thomson's Annals of Philosophy, Yol. XXII ; New Series, 

 Yol. YI, 1823, p. 258. 



