MELTING POINT OF METALS. 



149 



MELTING POINT OF VARIOUS METALS. 



Antimony. . . . 1150 Fahrenheit. 



Copper 

 Gold 



Iron (Cast) 

 Lead 



Mercury . 

 Silver 

 Tin . 

 Zinc . 



o 



2000 



2780 



617 



-39 



1800 



442 



773 



TABLE 



TO FIND THE NUMBER OF OUNCES TO THE TON 

 OF ORE FROM THE WEIGHT OF BUTTON OB- 

 TAINED BY CUPELLATION OR OTHER PROCESS. 



Ex. Suppose 200 grains of ore yield 2-7 grains of silver, how many 

 ounces is this to the ton of similar ore ? 



ioo grains will evidently yield 1-35 grains ; therefore, number of 

 ounces to the ton 



oz. dwt. gr. oz. dwt. gr. oz. dwt. gr. 



= 326 13 8 + 3x32 13 8 + 5X3 5 3 



which, when worked out, is exactly 441 oz. 



Again, suppose 50 grains yielded -02 grains ; what is this to the 

 ion ? 



ioo grains will evidently yield '04 grains; therefore the number of 

 ounces to the ton 



oz. dwt. gr. oz. dwt. gr. 

 = 4X3 5 8= 13 i 8 



