Portable electric mine lamps

Author:	Clark, H. H.
Year:	1913
Document Type:	USBM
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.7:47
Series:	Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number:	47
Subjects:	Mine explosions--Prevention
	Electric lamps, Portable--Safety measures
	Electric lamps, Portable--Design and construction
	Electricity in mining--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015077560863