188 METALS. 



Wherever we look around us, indeed, the uti- 

 lity of these bodies is apparent. Some of them, 

 besides being extensively employed in the arts, 

 and for domestic purposes, are coined into money. 

 Gold and silver are the most important of these, and 

 in all civilized countries are employed by buyers 

 and sellers. Commerce is chiefly carried on by 

 their means, and by the exchange of one article 

 for another, the value of each being first calculated 

 by the quantity of gold or silver it is worth. Cop- 

 per is largely used, amongst ourselves and other 

 nations, for coin of inferior value. 



Questions. 



Where are metals found ? 



What are the beds called in which they lie ? 



What name is given to metals when got in an impure 

 state? 



Name some of the properties of metals. 



What metals are the most extensible ? 



Can you tell what space an ounce of gold can be made to 

 cover, and what length of wire may be drawn from it? 



To what danger are miners exposed ? 



By what methods is the ore freed from impurities ? 



Are metals indispensable in most of the arts and manufac- 

 tures ? 



Name some of the uses to which they are applied ? 



What metals are coined into money 1 



