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, Wash-
ington, D. C.
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,
GOVERNMENT PRINTING OFFICE,
WASHINGTON, D. C.
The general law under which publications are distributed prohibits the giving
of more than one copy of a publication to one person. The price of this publi-
cation is 50 cents.
First edition, December, 1924.
George, H. C. Surface Machinery and Methods for Oil-Well Pumping. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc12407/. Accessed December 9, 2013.