Harvard Forest

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Hodgins (Mr.)

• Radiometer - 1929 spherical Type A with lower annulus B. 1929
• Radiometer - 1929 spherical Type B. 1929
• Radiometer - 1929 spherical Type C with black annulus A. 1929
• Radiometer - Detail of massive base. 1928
• Radiometer - Massive base.
• Radiometers - Polarization curves. 1929