Explosives and miscellaneous investigations: Explosives research, regulation of explosives and platinum, marine-boiler tests, underground sound ranging, training in first aid and rescue work, census of mining engineers and chemists, preparation of alloy steels, lighting aviation fields, cooperation with Capital issues committee. Advance chapter from Bulletin 178, War work of the Bureau of mines, Volumes 178-184

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Dec 31, 1919
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Science / Chemistry / Industrial & Technical
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