LXVII.

EXPLOSIONS IN MINES.

THICKNESS OF COAL SEAMS.—STUPIDITY OF A TURKISH MINING SUPERINTENDENT.—THE RESULT.—BLASTING IN MINES.—HOW IT IS DONE.—TERRIBLE ACCIDENTS.—MINES ON FIRE.—SCENES OF DEVASTATION.—EFFECT OF SUBTERRANEAN FIRE.—EXPLOSIONS OF FIRE-DAMP.—HORRIBLE ACCIDENTS.—STORIES OF SURVIVORS.—LOSS OF LIFE.—SCENE IN A WELSH MINE.—EXPLOSIONS IN ENGLISH AND AMERICAN MINES.—MODES OF RELIEF.—STORY OF TWO BROTHERS.—HOW THEY WERE SAVED.—THE SAFETY-LAMP.—ITS CONSTRUCTION.—THE FIRE-WALLS OF CHINA.—THE PENITENT AND CANNONEER. 948