Why miners' portable electric lamps require safety devices

Author:	Ilsley, L. C.
Year:	1922
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:2371
Series:	Report of investigations / United States. Bureau of Mines ;
Report Number:	2371
Subjects:	Safety lamps
	Mines and mineral resources--Equipment and supplies
	Electric lamps, Portable
	Mines and mineral resources--Research
Link:	https://hdl.handle.net/2027/mdp.39015086546705