TechnologyProspecting from the AirThe Airborne Magnetometer, Perfected During the War to Detect Submarines, Has Now Mapped Variations in the Earth's Magnetic Field Over 250,000 Square Miles. Its Purpose: to Reveal Hidden Formations Containing Minerals and OilBy Eugene F. Peterson, Homer Jensen on January 1, 1948AdvertisementABOUT THE AUTHOR(S)Recent Articles by Homer JensenSide-Looking Airborne RadarThe Airborne Magnetometer