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Methods and Costs of Gravel and Placer Mining in Alaska
From letter of transmittal: It is believed that this report will stimulate the mining industry by making available, in compact form, the accumulated results of the experience of mining men in this field and by directing attention to those mining methods developed in older districts which appear to be adapted to the conditions prevailing in Alaska.
Date:
1905
Creator:
Purington, Chester Wells
System:
The UNT Digital Library
Contributions to Economic Geology: 1904
From letter of transmittal: The report contains 63 contributions from 37 members of the Survey who have been engaged more or less continuously throughout the year in economic work, together with brief statements by the geologists in charge of the section of metalliferous ores and the section of nonmetalliferous economic minerals, of the extent and character of the economic work being carried on in the Survey.
Date:
1905
Creator:
Emmons, Samuel Franklin & Hayes, C. W.
System:
The UNT Digital Library