 | Ferdinand Freiherr von Richthofen - 1866 - 92 pages
...enormous wealth in a few years. Mining, then, was confined to rich ores within a few hundred feet from the surface. In the present century, since greater...It appears, on the contrary, that it has never been as high as at the present time. Humboldt states that vastly the majority of the annual production of... | |
 | United States. Department of the Treasury, John Ross Browne - 1867 - 326 pages
...present century, since greater depths have been reached, the Spanish crown, if it had still the sceptre of Mexico, would scarcely have found an opportunity...It appears, on the contrary, that it has never been so high as at the present time. Humboldt states that vastly the majority of the annual production of... | |
 | United States. Congress. House - 1867 - 780 pages
...present century, since greater depths have been reached, the Spanish crown, if it hed still the sceptre of Mexico, would scarcely have found an opportunity...population and the increased facilities of raising the treasure». And yet the production of the Mexican mines has anything but decreased. It appears, on... | |
 | John Ross Browne, James Wickes Taylor - 1867 - 374 pages
...depths have been reached, the Spanish crown, if it had still the sceptre of Mexico, would scarcely huve found an opportunity of bestowing equal honors on...population and the increased facilities of raising the tieasures. And yet the production of the Mexican mines has anything but decreased. It appears, on the... | |
 | Adolph Sutro - 1868 - 256 pages
...enormous wealth in a few years. Mining, then, was confined to rich ores within a few hundred feet from the surface. In the present century, since greater...It appears, on the contrary, that it has never been as high as at the present time. Humboldt states that vastly the majority of the annual production of... | |
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Spanish crown, if it had still the scepter of Mexico, would scarcely have found an opportunity of bestowing equal honors on fortunate mining adventurers, notwithstanding the unabated enterprising spirit of the population, and the increased facilities... 