VI 



CONTENTS. 



Page. 



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

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



On Native Hydrous Alurciuate of Lead or Plomb Gorarae . 67 

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



On a Fibrous Metallic Copper 68 



Thomson's Annals of Philosophy, Vol. XVI, 1820, p. 46. 



An account of a Native Combination of Sulphate of Barium 



and Fluoride of Calcium 71 



Thomson's Annals of Philosophy, Vol. XVI, 1820, p. 48. 



On some Capillary Metallic Tin 74 



Thomson's Annals of Philosophy, Vol. XVII ; New Series, 

 Vol. I, 1821, p. 271. 



On the Detection of very Minute Quantities of Arseuic and 



Mercury 75 



Thomson's Annals of Philosophy, Vol. XX ; Now Series, 

 Vol. IV, 1822, p. 127. 



Some Improvements in Lamps 78 



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

 Vol. IV, 1822, p. 363. 



On the Crystalline Form of Ice 80 



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

 Vol. V, 1823, p. 340. 



A Means of Discrimination between the Sulphates of Barium 



and Strontium ........ 81 



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

 Vol. V, 1823, p. 359. 



On the Discovery of Acids in Mineral Substances . . 82 



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

 Vol. V, 1823, p. 384. 



An Improved Method of Making Coffee .... 87 

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

 Vol. VI, 1823, p. 30. ■* « 



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

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

 Vol. VI, 1823, p. 258. 



