OCR Text |
Show Da. Foster, government inspector of minea in England, Bent a telephone down the ventilating Bhaft of the Eliza mino, at St. Austell, Cornwall, the instrument having been attached to a covered copper wire, and in leea than fifteen minutes persons Bpeaking at the bottom of the mine were distinctly distinct-ly audible on the eurface. The telephone tele-phone will supersede the inefficient oord signals hitherto used as a means of communication from the interior of deep mines to the ground above. |