Eugene Haanel · 2 obras en el catálogoObrasOn the Location and Examination of Magnetic Ore Deposits by Magnetometric MeasurementsGGalvanometric method for the determination of the earths magGalvanometric method for the determination of the earths magnetism and its oscillations
GGalvanometric method for the determination of the earths magGalvanometric method for the determination of the earths magnetism and its oscillations