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and is an Ingredient in Pewter, Bell Metal, 

 and the mixt Metal of which Printing 

 Types are made. Bifmuth is hard, and 

 lefs friable than Antimony ; it is very 

 rarely found native, more commonly in 

 the State of Ore, occafioncd by a large 

 Mixture of Sulphur and Arfenic. Pro- 

 perly prepared it enters into the Compo- 

 fition of Bell Metal, and the Metal of 

 which Printing Types are made, like An- 

 timony, it renders other Metals more 

 eafily fufible. It is found in Germany^ 

 and in many Parts of Englajid. Cobalt is 

 a compad heavy Mineral, has a fliining 

 Appearance, and much rcfembles fome of 

 the Antimonial Ores : It is found in dif- 

 ferent Forms and Colours, owing to va- 

 rious Accidents from Cobalt is produced 

 Zaffer and Smalt ^ the Mendip Hills in 

 England afford it, but it is not fo rich as 

 the German and Bohemian. 



The Lapis Calaminaris is a fpungy Sub- 

 ftance, of a lax and cavernous Strudlure, 

 yet confiderably heavy ; when pure, it is_ 



of 



