Showing 821 - 835 results of 835 for search '', query time: 0.16s Refine Results
  1. 821
    Carbonizing properties and petrographic composition of Millers Creek bed coal from Consolidation no. 155 mine, Johnson County, Ky., and effect of blending Millers Creek coal with Pocahontas bed and Pittsburgh bed (Warden mine) coals.
    Published 1937
    Electronic resource (PDF)
    Government Document eBook
  2. 822
    Analyses of Colorado coals.
    Published 1937
    Electronic resource (PDF)
    Government Document eBook
  3. 823
    Tests of compressibility and bearing strength of potash salt.
    Published 1937
    Electronic resource (PDF)
    Government Document eBook
  4. 824
    West Virginia coal­mine accident costs and data, July 1, 1929–June 30, 1934.
    Published 1937
    Electronic resource (PDF)
    Government Document eBook
  5. 825
    Ball-­mill grinding.
    Published 1937
    Electronic resource (PDF)
    Government Document eBook
  6. 826
    Methods for detection and determination of carbon monoxide.
    Published 1938
    Electronic resource (PDF)
    Government Document eBook
  7. 827
    Analyses of Pennsylvania bituminous coals.
    Published 1939
    Electronic resource (PDF)
    Government Document eBook
  8. 828
    Federal placer-­mining laws and regulations; Small-scale placer-mining methods.
    Published 1938
    Electronic resource (PDF)
    Government Document eBook
  9. 829
    Allaying dust in bituminous­coal mines with water.
    Published 1939
    Electronic resource (PDF)
    Government Document eBook
  10. 830
    Carbonizing properties and petrographic composition of Pittsburgh-­bed coal from Bureau of Mines Experimental Mine, Bruceton, Allegheny County, Pa.
    Published 1939
    Electronic resource (PDF)
    Government Document eBook
  11. 831
    Carbonizing properties and petrographic composition of Sewell bed coal from Wyoming mine, Wyoming County, W. Va., and effect of blending this coal with Alma bed coal.
    Published 1939
    Electronic resource (PDF)
    Government Document eBook
  12. 832
    Inspection and maintenance of mine hoisting ropes.
    Published 1939
    Electronic resource (PDF)
    Government Document eBook
  13. 833
    Production of explosives in United States during calendar year 1938.
    Published 1938
    Electronic resource (PDF)
    Government Document eBook
  14. 834
    Procedure for establishing a list of permissible self-­contained oxygen breathing apparatus, fees, character of tests, and conditions under which mine rescue breathing apparatus will be tested.
    Published 1935
    Electronic resource (PDF)
    Government Document eBook
  15. 835
    Permissible telephones and signaling devices, requirements for permissibility, tests made, and fees charged.
    Published 1939
    Electronic resource (PDF)
    Government Document eBook
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