CONTENTS. & 



CHAP. XXXII. page 192. 

 Copper. 



General Properties cf C of per. Its Natural Hflory. Turquoife Gem. 

 Smelting and refining of Copper. Antique Statues preferred ly the 

 Green Ruft. Union with Acids. Blue Vitriol. Colouring of Guns. 

 'Cuprum Ammoniacum. Verdigris. Union with Metals. White 

 Copper. Pinchbeck. -Gun Metal. Bell Metal. Metal of ancient 

 Statues. Bronze. Speculums of Reflecting TeleJccpes.Pot MetaL~~* 

 finning of Copper. 



CHAP. XXXIIL page 204. 

 Mercury. 



Great At f raft ion of this Metal for the Matter of Heat. Quick/ifo er j 

 rendered folid ; malleable. General Properties of Quickfelver, Hy- 

 drargyru! calcinatus. Natural Hiftory of Mercury. Cinnabar.* 

 Native Vermilion. Action of Acids on this Metal. Turbith Mihe~ 

 ral. Red Precipitate. ^White Precipitate. Corrofive Sublimate.' 

 Calomel. Keyfer's Pills. Ethiop's Mineral. Vermilion. Amal- 

 gams. Gold made brittle by Mercury. Mode of gilding Metals. 

 Ufe of ^uickjtlver in extracting the precious Metals from the Earth. 

 Making of Looking GlaJJes. Conditions necejjary for the Operation 

 of Mercury on the human Body. 



CHAP. XXXIV. page 215. 



Silver. 



Cbarafler of the perfect Metals. General Properties of Silver. Vege- 

 tation of Silver. 'Natural Hijlory of Silver. AJJay ing of Silver,* 

 Cupellation. Lunar Cauftic. Fulminating Silver. Luna Cornea, 

 Diana's Tree. Green Gold. Standard Silver Coin. Plating 

 with Silver ; hovj performed. French Plate. 



CHAP. XXXV- page 227. 

 Gold. 



General Properties of Gold. Gold calcined ly Electricity. Extreme 

 Ductility of this Metal. Natural Hijlory cf Gdd.Proce/es for 

 feparating Gold from other Subftances. Quart ation. The Touch- 

 Jlone.Aqua Regia. Reafons why the different Acids act on metallic 

 Bodies* Fulminating Gold. Purple Powder of CaJJius. Golden 



Calf 



