Search U.S. government technical reports digitized or harvested by TRAIL.

Keyword Search

Some signaling systems in metal-mine shafts

Electromagnetic noise in Robena No.4 Coal Mine

An electromagnetic system for detecting and locating trapped miners

Seismic detection of trapped miners using in-mine geophones

Published Year

• 1930-1939 (1)
• 1970-1979 (3)

Subject

• Mine communication systems (4) *
• Mine safety (4) *
• Signals and signaling (1)

Author

• Powell, James A. (2)
• Adams, John W., (1)
• Bensema, W. D. (1)
• Gleim, E. J. (1)
• Kanda, Motohisa, (1)
• Mosier, McHenry (1)
• Watson, Richard A., (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

Search developed and maintained by the University of Washington Libraries
Copyright 2010