. Annual report of the Board of Regents of the Smithsonian Institution . used also exertsconsiderable influence on the tests. It has been known for a long time that coal dust as well as pitgas is highly explosive. I believe that Engler, when investigatingexplosions in the charcoal heaps of the Black Forest,* was the first toshow that mixtures of coal gas and air, so poor in gas as to be non-inflammable, were rendered explosive by the addition of some char-coal dust. The Mining Association of Great Britain took the lead,experimentally investigating the influence of coal dust on explosionsin min
. Annual report of the Board of Regents of the Smithsonian Institution . used also exertsconsiderable influence on the tests. It has been known for a long time that coal dust as well as pitgas is highly explosive. I believe that Engler, when investigatingexplosions in the charcoal heaps of the Black Forest,* was the first toshow that mixtures of coal gas and air, so poor in gas as to be non-inflammable, were rendered explosive by the addition of some char-coal dust. The Mining Association of Great Britain took the lead,experimentally investigating the influence of coal dust on explosionsin mines. An iron shell 7 feet G inches in diameter and 1,083 feetlong was used to carry out the experiments. So far it has alreadybeen ascertained ^ that two zones of stone dust on either side of a zoneof coal dust arrested the path of a flame, and that unless the coal-dust zone exceeded 180 feet in length, no explosive force was mani- aCbeuiiscbe Industrie, ]885, No. 6. ^ Coal dust experiments, The Times, September 24, 1908. Smithsonian Report, 1908.—Guttmann. Plate Testing Station at Frameries (End View). Smithsonian Reoort, 1908,—Guttmann. Plate 8.
Size: 1314px × 1902px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
