Evening Republican, Volume 22, Number 193, Rensselaer, Jasper County, 16 August 1919 — Torpedo Digs Own Tunnel. [ARTICLE]

Torpedo Digs Own Tunnel.

Added to the list of interesting but tardy war inventions is a so-called “earth torpedo” of Canadian origin, described by Popular Mechanics Magazine. It bores its subterranean way undetected toward the enemy lines, and then explodes with great force. The burrowing operation is hydraulic. The nose of the torpedo is equipped an ingenious boring nozzle, and takes with it a length of, hose, ..which a pump in the trench supplies with water at 300 pounds pressure. This part of the performance is, silent. In a test the device burrowed for 200 feet md then blasted out an excavation 20 feet across.