This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ The Explosibility Of Coal Dust, Volumes 18-21; Volume 20 Of Bulletin (United States. Bureau Of Mines); Volume 425 Of Geological Survey Bulletin reprint George Samuel Rice, Joseph Christie Whitney Frazier Govt. Print. Off., 1911 Technology & Engineering; Mining; Coal mines and mining; Mine explosions; Technology & Engineering / Mining

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ The Explosibility Of Coal Dust; Issue 425 Of Bulletin (Geological Survey (U.S.))); Volume 425 Of U.S. Geological Survey Bulletin George Samuel Rice, Joseph Christie Whitney Frazer, Axel Larsen, Frank Haas, Carl Scholz (1876-), Carl Scholz Government Printing Office, 1910 Technology & Engineering; Mining; Coal mines and mining; Technology & Engineering / Mining