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Then there’s that most important instrument, the earth inductor compass.

He had a tachometer, and an altimeter, an earth inductor compass, a drift indicator, and—” Captain Bill interrupted.

Their earth inductor compass had fits of running wild, their radio had become disabled, they were fast running out of gasoline�when suddenly at 3 a. m. they saw the sea-coast and the flicker of a lighthouse beacon beneath them.

An earth inductor compass, a magnetic compass on the conventional instrument board and maps were his navigating facilities.

Morris M. Titterington, 35, and lady friend, in a plane smash; at Pottsville, Pa. He founded the Pioneer Instrument Co., invented the earth inductor compass, said to have made long airplane flights possible.