Sentence Examples

  • But when coal-dust is present, and little or no marsh-gas, an initial explosion - such as is produced by a blown-out shot - is required.
  • Fire-damp and dust explosions are caused by the presence of marsh-gas in sufficient quantity to form an explosive mixture, or by a mixture of small percentages of marsh-gas and coal-dust, and in some cases by the presence of coal-dust alone in the air of the mine.
  • Explosive mixtures of marsh-gas and air may be fired by an unprotected light.