The Saxl and Allen experiments
•From the 1950s through to 1970, Saxl and Allen operated a large torsion pendulum at Harvard, repeatedly measuring the period over extended experimental series taking many days. Not only did they detect periodic deviations similar to those found by Allais, but during the solar eclipse of 1970 they detected a pronounced increase of the period. They also observed a weak spike during a lunar eclipse.
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•(A torsion pendulum operates independently of Earthfs gravitation; the effects are produced only by the torsion of the support wire and the rotational inertia of the bob)