124 



DESCRIPTIONS OF MINERALS. 



In the " Elements of Metallurgy/' of J. Arthur Phillips, the yield 

 for 18 1 2 is given approximately, as follows : 



Lbs. Troy. 

 52,400 

 15,000 

 92,000 



Great Britain 



Norway and Sweden 



Hungary, Transylvania, and the Ban at. . 



Saxony 80,000) 



Haruz 27,500 [ 178,000 



Rest of Germany 60,500) 



Russia 50,000 



France 10,500 



Italy 32,000 



Spain 100,000 



Peru 200,000 



Bolivia 450,000 



Chili 300,000 



Central America 53,000 



Mexico 1,000,000 



United States 1,250,000 



Total 3,788,900 



Mr. Phillips states that the total for the vear probablv amounted to 

 4,100,000 lbs. troy, the value of which is £13,000,000, or .v63,000,000. 

 In the above the amount from the United States is diminished to make 

 It correspond with the preceding statement for 1872. 



The following table gives, in dollars, the estimated value of the 

 world's production of silver in recent years : 



1855 

 1800 

 1865 

 1870 

 1875 



Russia. 



600,0C0 

 650,000 

 700,000 

 575,000 

 500,000 



United States. 



15^,000 

 11,250,000 

 17,320,000 

 31,635,000 



Mexico and 

 South America 



30,000,000 

 30,000,000 

 30,000,000 

 25.000,000 

 25,000,000 



Other Countries. 



10,000,000=40,600,000 

 10,0! 10,000=40,800,000 

 10,000,000=51,950,000 

 10,000,000=57,895,000 

 10,000,000=67,135,000 



The total for 187" is estimated at 76 millions. 



The world's production of silver for the period of twenty-six years, 

 from 1852 to 1877, is estimated at $1, 341, 800,000 ; for the preceding 

 twenty-two vears— from 1830 to 1851, inclusive— at $600,400,000 ; for 

 the preceding thirty years— from 1800 to 1830— at $799,100,000. 



Native Platinum. 



Isometric : but crystals seldom observed. Usually in flat- 

 tened or angular grains or irregular masses. Cleavage none. 

 Color and streak pale or dark steel-gray. Lustre metallic, 



