Sulphur trioxide smoke tubes for determining air currents.

Bibliographic Details

Corporate Author:	United States. Bureau of Mines
Format:	Government Document eBook
Language:	English
Published:	[Washington] : [publisher not identified], 1923.
Series:	Mines Bur. Rpt. of Investigation No. 2505
Subjects:	Chemicals. Mines and mineral resources. Ventilation. Electronic books.
Online Access:	Connect to the full text of this electronic document