How to improve the hot-air furnace

Author:	Baker, Charles Whiting,
Year:	1918
Document Type:	USBM
Issuing Agency:	U.S.Bureau of Mines,
SUDOC:	I 28.7:208
Series:	Technical paper / Department of the Interior, Bureau of Mines ;
Report Number:	208
Subjects:	Hot-air heating--Equipment and supplies--Design and construction
	Furnaces--Design and construction
Link:	https://hdl.handle.net/2027/mdp.39015077565789