< Page:Popular Science Monthly Volume 74.djvu
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THE WORLDS ANNUAL METAL CROP
283
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 | |
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