Search U.S. government technical reports digitized or harvested by TRAIL.

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Limestone.

Patents on geophysical prospecting issued in the United States, England, Canada, Australia, Germany, France, and Russia

The design of small wooden head frames

Prospect trenching with caterpillar-mounted angledozers

Guide to prospecting for lode gold

How to mine and prospect for placer gold

Published Year

• 1930-1939 (3)
• 1940-1949 (1)
• 1950-1959 (1)
• 1970-1979 (1)

Subject

• Prospecting (6) *
• Gold mines and mining (2)
• Geophysics (1)
• Limestone (1)
• Limestone industry--United States--History (1)
• Mines and mineral resources (1)
• Mining engineering (1)
• Placer mining (1)

Author

• Ayvazoglou, W. (1)
• Bowles, Oliver, (1)
• Clawson, Marion. (1)
• Gardner, E. D. (1)
• Lorain, S.H. (1)
• Staley, W. W. (1)
• West, John M. (1)

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