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Rubber-sheathed trailing cables
L. C. Ilsley · U.S. G.P.O.
53 sayfa · 1932
Cables / Coal mines and mining / Electricity in mining / Safety measures
Inspection and testing of mine-type electrical equipment for permissibility
L. C. Ilsley · U.S. Dept. of the Interior, Bureau of Mines
23 sayfa · 1954
Mining machinery / Electricity in mining / Testing / Electric equipment
Approved electric lamps for miners
H. H. Clark, L. C. Ilsley · G.P.O.
59 sayfa · 1917
Portable Electric lamps / Mining machinery / Machines minières
Flame safety lamps
J. W. Paul, L. C. Ilsley, E. J. Gleim, United States. Bureau of Mines · Govt. print. off.
212 sayfa · 1924
Safety / Safety lamps