Page:Popular Science Monthly Volume 74.djvu/287

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283
THE WORLDS ANNUAL METAL CROP

mankind is bound to reflect this great change in the nature of the materials upon which it impresses its ideals and will.

On the following sheet is given the statistics of the crop of the principal commercial metals for the year 1906.

The Metal Crop of the World during 1906

Tons  Value 
Aluminum 20,157 $15,319,320
Copper 786,794 309,996,839
Gold 675 406,931,323
Iron 64,983,481 2,323,799,280
Lead 1,061,533 120,483,995
Mercury 3,964 4,233,552
Nickel 18,983 16,879,684
Platinum 5 .5 3,527,481
Silver 6,365 123,822,928
Tin 108,738 86,577,768
Zinc 774,525 69,428,421
Total 67,765,220.5 $3,481,000,591