Diamond drilling and diamond bit investigation.
Part 1,
Drilling tests in uniform granite /
by Leonard Obert [and others].

Description

Related Names

Long, Albert.
Chayes, Felix.
Gabriel, Alton.
Agnew, Wing G.
Obert, Leonard, 1906-

Language(s)

English

Published

[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1947.

Subjects

Granite.
Diamond bits > Diamond bits / Testing.
Boring.

Note

"March 1947"--pt. 1; "April 1948"--pt. 2.
Cover title.

Physical Description

18 p., [13] leaves of plates : ill. ; 27 cm.

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