Scope of Bibliography: "This bibliography contains references to all technical and scientific articles pertaining to helium that are known by Bureau of Mines scientists to have been published before January 1, 1947. It also contains many references to articles containing information on helium that have appeared in medical journals and some popular magazines."

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.

Report issued by the U.S. Bureau of Mines discussing materials surveys conducted on mercury. As stated in the foreword, "the surveys dealing with metals and minerals summarize the demand-supply position in the United States and include information on production, imports, consumption, exports, substitutes, and pertinent history" (p. v). This report includes maps, tables, illustrations, and photographs.

Report displays a bibliography of numerous literature affirms air pollution has been a problem through the centuries.

From Introduction: "Problems connected with incidence, effects, determination, and control of dusts are still much before the public, although more information is available to the layman than when Bulletin 400, of which this publication is a revision, was issued in 1937. This revision includes data that have accumulated since 1937 and some that appeared previous thereto but were not available to the authors at that time."

From Introduction: This review contains abstracts of the technical literature and patents dealing material application of the Bergius and related processes for the hydrogenation, under greater than atmospheric pressures, of liquid and solid carbonaceous materials such as coal, lignite, their distillation and extraction products, pitches and tars, and petroleum and its distillation residues."