dokumen.pub (copy of H. Kragh, Varying Gravity: Dirac's Legacy in Cosmology and Geophysics, Springer/Birkhauser 2016), 2026-10-04

URL: https://dokumen.pub/varying-gravity-diracs-legacy-in-cosmology-and-geophysics-1st-ed-3319243772-978-3-319-24377-1-978-3-319-24379-5-3319243799-113-113-123-1.html Found by Google: "William J. Hooper" OR "W. J. Hooper" Principia College physics archives OR obituary 1971 Saved: a short excerpt for review only, files/kragh-varying-gravity-2016-Fisher-excerpt.txt. The dokumen.pub copy is an unauthorized mirror of a copyrighted book. Cite the Springer edition (sec. 3.2, "Pascual Jordan: Geophysicist?", pp. 68-69). Result: positive (historical record, priority 4). The author is an academic historian of science, with no stake in Hooper's work.

Findings [web] URL above (Kragh 2016, pp. 68-69)

• Hooper's 1957-59 collaborator was Joel Ellis Fisher: born 30 Nov 1891, died New York 6 Jan 1966.
• Businessman: president of the North-Western Terminal Railroad (Denver), later a director of the Melville Shoe Corporation.
• Mountaineer and amateur scientist. Member of the New York Academy of Sciences from 1949.
• Published on orogeny and glaciology in the American Journal of Science (1940s) and the Journal of Glaciology (1950, 1955).
• Privately printed Some Problems of Geophysics, Approached from Viewpoints of Modern Physics (1950).
• Kragh: "In the late 1950s Fisher collaborated with William J. Hooper, a physics-trained inventor, in experiments on the generation of anti-gravity from electric fields. Their research was presented at meetings of the American Physical Society and resulted in two US patents to Hooper."
• Fisher strongly influenced Pascual Jordan's expanding-Earth / varying-G hypothesis (Schwerkraft und Weltall, 1955). Kragh says this connection had not been noted before.
• Kragh's obituary sources for Fisher: American Alpine Club, http://publications.americanalpineclub.org/articles/12196611500/Joel-Ellis-Fisher-1891-1966, and Alpine Journal 1966, pp. 190-198, In Memoriam (not visited).

Bearing

• Confirms from an independent historian that the Fisher-Hooper APS presentations happened, and identifies Fisher.
• Fisher died in 1966, so he could not have taken part in the 1968-71 generator work.
• Fisher's papers or his Gravity Research Foundation material may hold the 1957 rotor and gravity-meter data, including the acoustic artifact (claim 6).