Show investigate submarine explosion san redro cal an investigation to establish the cause of 0 the explosion on the tha submarine S 37 which cos cost t the lives of three men and the injury ot of five others was under way thursday on the mother ship beaver a longside alongside the submarine squadron in the outer harbor here the batteries were being charged when the ralo slon occurred and naval men inn generally expressed the unofficial opinion that a short circuit caused the dgill ignition of hydrogen gas |