Report issued by the U.S. Bureau of Mines discussing the costs and methods of uranium mining in San Juan County, Utah. History, geology, and production of the uranium mines are presented. This report includes tables, maps, illustrations, and photographs.

Report including seven miners' circulars on accident prevention in metal and nonmetallic mines. The explain the cause of mine fires and methods used to prevent and control them, the occurrence of gases in mines, and the importance of standards in ventilation.

From Introduction: "One of the many services rendered by the Federal Bureau of Mines is the identification and general examination of ore and mineral samples. This publication describes methods of testing these samples. The object of this publication is to present the testing procedures in general use in the industry up to the point where the checking becomes a quantitative one for particular products."

Report issued by the Bureau of Mines over studies conducted on the geologic factors related to block-caving. The results of the study are presented. This report includes tables, maps, and illustrations.

Summary: "The engineering survey, summarized in this report, consisted of studies on acid mine water, underground-water pools, the "buried valley" of the Susquehanna River, inundated anthracite reserves, mine pumping plants, surface-water pools, seepage of surface water into mines, barrier pillars between mines, and geologic features of the region that included core drilling along alinement of the proposed Conowingo tunnel and to some extent along the proposed Marcus Hook alternate tunnel route. A comprehensive study was conducted to determine corrosion and erosion resistance of selected metals and alloys and to ascertain their suitability for components of pumps to be used in handling acid mine water."