Publisher's Synopsis
Excerpt from Twentieth Annual Report of the United States Geological Survey to the Secretary of the Interior, 1898-99, Vol. 1 of 7: Director's Report, Including Triangulation and Spirit Leveling
Practically all governments except the United States have established a system of inspection and regulation of mines throughout their domain, and many have, through their geologic and other surveys, prepared topographic and geologic maps that have been of material aid in the development of mining interests.
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