Showing 201 - 220 results of 122,013 for search '', query time: 0.43s Refine Results
  1. 201
    Modern automatic electrically controlled elevators for transporting men at two coal mines in Western Pennsylvania /
    by Holcomb, J. W
    Published 1952

    Government Document Book
  2. 202
    Hazard of firing open, unconfined shots in coal mines /
    by Ankeny, M. J
    Published 1952

    Government Document Book
  3. 203
    Production of manganese slags for manufacturing high-grade ferromanganese by blowing oxidation spiegeleisen /
    by Kootz, Theodore
    Published 1952

    Government Document Book
  4. 204
    Recommendations for improved shuttle-car-haulage safety /
    by Kingery, D. S (Donald Samuel)
    Published 1952

    Government Document Book
  5. 205
    Annual report of research and technologic work on coal, fiscal year 1951 /

    Government Document Book
  6. 206
    Filling with unclassified tailing in modified cut-and-fill stopes, Dayrock Mine, Wallace, Idaho /
    by Toepfer, Peter H
    Published 1952

    Government Document Book
  7. 207
    Some factors affecting and suggested ways for improving coal-mine ventilation, with particular reference to mines in Illinois, Indiana, and Western Kentucky /
    by Herbert, C. A
    Published 1953

    Government Document Book
  8. 208
    Drainage and utilization of firedamp /
    by Venter, J
    Published 1953

    Government Document Book
  9. 209
    Regeneration of spent pickle liquor /
    by Martinez, B. P
    Published 1953

    Government Document Book
  10. 210
    Pulverizing lignite in a North Dakota powerplant /
    by Ellman, R. C
    Published 1961

    Government Document Book
  11. 211
    Escapeways and other emergency measures in coal mines /
    by Stahl, R. Ward
    Published 1962

    Government Document Book
  12. 212
    Technological and economic problems of rare-earth metal and thorium resources in Colorado, New Mexico, and Wyoming /
    by Kelly, Francis Joseph
    Published 1962

    Government Document Book
  13. 213
    Mining and milling methods and costs, Eastern Magnesia Talc Co., Johnson Mine, Johnson, Vt. /
    by Burmeister, H. L
    Published 1963

    Government Document Book
  14. 214
    Methods and costs of shaft sinking, U.S. Atomic Energy Commission Project Gnome, near Carlsbad, New Mexico /
    by Howes, Merwin H
    Published 1963

    Government Document Book
  15. 215
    Drill dust-collectors and drilling equipment with integral dust-collecting systems approved by the Bureau of Mines as of January 31, 1961 /
    by Anderson, Floyd G
    Published 1961

    Government Document Book
  16. 216
    Sodium sulfate deposits along the southeast shore of Great Salt Lake, Salt Lake and Tooele Counties, Utah /
    by Wilson, Stephen R
    Published 1957

    Government Document Book
  17. 217
    Mining methods and costs at the Porcupine United Gold Mines' Rochester Mine at Timmins, Ontario /
    by Tolman, J. D
    Published 1931

    Government Document Book
  18. 218
    Underground chute gates in metal mines /
    by Jackson, Chas. F
    Published 1931

    Government Document Book
  19. 219
    Essential factors influencing subsidence and ground movement /

    Government Document Book
  20. 220
    Mining methods and costs at the Braden Copper Co.'s mines, Sewell, Chile /
    by Webb, J. S
    Published 1932

    Government Document Book
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