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Test of treated timbers in mine at Negaunee, Mich
Test to obtain information on absorption by and penetration into mine timbers, of zinc chloride, borax, and sodium fluoride by hot and cold bath process; effectiveness of three chemicals in extending life of mine timbers; and to compare average useful life of treated timbers and untreated timbers; service test of maple timbers installed in main haulageways of Athens mine.
Test of treated timbers in mine at Negaunee, Mich
Test to obtain information on absorption by and penetration into mine timbers, of zinc chloride, borax, and sodium fluoride by hot and cold bath process; effectiveness of three chemicals in extending life of mine timbers; and to compare average useful life of treated timbers and untreated timbers; service test of maple timbers installed in main haulageways of Athens mine.
Test of treated timbers in mine at Negaunee, Mich
U S Bur Mines -- Report Investigations
Crawford, F.S. (author) / Wirka, R.M. (author)
1950
6 pages
Supp plates
Report
English
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