3 edition of Rock Dust in Bituminous-Coal Mines During 1930-33. found in the catalog.
Rock Dust in Bituminous-Coal Mines During 1930-33.
United States. Bureau of Mines.
|Series||Report of investigations (United States. Bureau of Mines) -- 3295|
|Contributions||Adams, W.W., Geyer, L.E., Parry, M.G.|
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Real coal prices rose from toand bituminous coal prices fell sharply from then to (Figure 12) Coal mining employment plummeted during the twenties.
Annual earnings, especially in bituminous coal mining, also fell because of dwindling hourly earnings and, from on, a shrinking workweek.
(Figure 13). This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Ctn. 2 12 All-American Canal (Calexico, Calif.) 13 Bechtel-Kaiser Company, Ltd.
14 Burlew nomination hearings 15 Columbia River dredging 16 Combination matters Consolidated Builders, Inc. 20 Coos Bay (Ore.) Jetty 21 General Rock Dust in Bituminous-Coal Mines During 1930-33. book Company 22 Grays Harbor (Wash.) jetty PUBLIC "-//University of California, Berkeley::Bancroft Library//TEXT (US::CU-BANC::BANC MSS 83/42 c::Henry J.
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Obituary Record of Graduates of Yale University. Special Bulletin No. SILICOSIS AND ITS PREVENTION By Adelaide Ross Smith New York State Dept, of Labor EDWARD CORSI Industrial Commissioner Special Bulletin No.
It was published in Bulletin for October "Blue Book." — In addition to the regular publications, the so-called "Blue Book" was issued during the year.
The contents consist of Specifications for the Design and Construction of Steel Railway Bridges and for Concrete Railway Structures. ExrHTiimnits with hot-water treHtnieiit of daCfoilils in relation to forcing' and lii-ld culiuie; l»y David Gritiiths.
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