OCR Text |
Show Tunneling by Electricity The new tunnel of the Great Northern North-ern railway under the Cascade mountains moun-tains is literally being driven hy electricity. elec-tricity. Blasting shots planted in the rock are fired by it, shoveling machines ma-chines are driven by It, rock and dirt are hauled out and materials hauled into the bore by six, ten and twenty-ton twenty-ton mine-type electric locomotives, and lighting and some special heating in and around the Job are all done electrically. |