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The Bureau of Mines, in carrying out one of the provisions of its organic act-to disseminate information concerning investigations made-prints a limited free edition of each of its publications.
When this edition is exhausted copies may be obtained at cost price only through the Superintendent of Documents, Government Printing Office, Washington, D. C., who is the authorized agent of the Federal Government for the sale of all publications.
The Superintendent of Documents is not an official of the Bureau of Mines. His is an entirely separate office and he should be addressed:
SUPERINTENDENT OF DOCUMENTS,
The general law under which publications are distributed prohibits the giving of more than one copy of a publication to one person. Additional copies must be purchased from the Superintendent of Documents. The price of this bulletin is 15 cents.
First edition. October, 1914.