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Triangulation observations following major earthquake.
Lt
Lt
Observing gravity inside the cave at Station Jaggar
Brown Gravity Meter pendulum apparatus.
Chart showing isogonic lines for year 1900
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Magnetic station at Hobhouse Inlet
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Transit magnetometer station
Transit magnetometer station.
Chart showing isogonic lines for year 1900
Making magnetic observations for declination.
Co-tidal lines of the world.
Measuring absolute value of declination with a declinometer.
Magnetic observations by party of M
James Madison Alden, captain's clerk and artist, on the Coast Survey s...
President Dwight David Eisenhour at the 150th Anniversary dinner of th...
Captain Sig Peterson preparing to make presentation of carved NOAA Cor...
Commander George Morris instructing Liberian engineering students in t...
Caaptain Sig Peterson presenting Rear Admiral Harley Nygren with a car...
Colonel H
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