The National Geographic Magazine, Volume 85National Geographic Society, 1944 - Geography Indexes kept up to date with supplements. |
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Page 48
... mines are being re - explored and opened for production to meet expanded war demands . Ever larger quantities are being rushed to Allied war factories . Digging Crystals in Minas Gerais . I visited several of the Minas Gerais mines ...
... mines are being re - explored and opened for production to meet expanded war demands . Ever larger quantities are being rushed to Allied war factories . Digging Crystals in Minas Gerais . I visited several of the Minas Gerais mines ...
Page 578
... mines and more than 5,000 companies . Outstanding combinations , such as those in steel and automobiles , do not exist . It takes comparatively little capital to open a small coal mine , and titles to coal lands are scattered among ...
... mines and more than 5,000 companies . Outstanding combinations , such as those in steel and automobiles , do not exist . It takes comparatively little capital to open a small coal mine , and titles to coal lands are scattered among ...
Page 587
... Mines in 1910 . The average deaths per million tons of coal mined were 4.76 in 1911-15 , but by 1936- 40 had fallen to 2.71 . The largest single mine disaster was on December 6 , 1907 , at Monon- gah , West Virginia , when 361 men were ...
... Mines in 1910 . The average deaths per million tons of coal mined were 4.76 in 1911-15 , but by 1936- 40 had fallen to 2.71 . The largest single mine disaster was on December 6 , 1907 , at Monon- gah , West Virginia , when 361 men were ...
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