| | Journal (issue) | tipped rods and detachable bits. It consists of the new 45-pound S48 Sinker—the equal of most 55-pound drills...shaft-sinking models also available. 233 Broadway, New York 7, N.Y., Company, Quincy. Illinois, U.S.A. ...tical or undesirable. Offers lowe unit bit cost. New ‘‘Spiralock union holds bit dependably—pe: mits easy...have been solving rock bit problems for 18 years. MINING Anxele Roller rock pany makes multi-use, carbide...Top—Cave the Bottom Inspiration Copper’s New Pit New Mexico Miners Meet Russian Minerai Strength The | | | Journal (volume) | California OF MlNE&siTY of AV,S RY I ( 59 Amador County, IRY BUILDING, 9 LIBRARY STATE OF CALIFORNIA...containing several thousand books and on geology, mining, mineralogy, chemistry, metallurgy, and related...devoted to the petroleum and mining industries, and newspapers from the mining centers of the state exhibits...California minerals and a conference room with a mining engineer in attendance to serve the public and...mineral resources, mineral industry, geology, and mining operations of California is distributed to the |
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