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Mcgruder, C.H. (1978) Field Energies and Principles of Equivalence. Nature, 272, 806-807.
https://doi.org/10.1038/272806a0

has been cited by the following article:

• TITLE: Experimental Proposal to Determine the Gravitational Effect of Electrostatic Field Energy

  AUTHORS: Charles H. McGruder III

  KEYWORDS: General Relativity, Electrostatic Field Energy, Torsion Balance Instrument

  JOURNAL NAME: Journal of Modern Physics, Vol.16 No.10, October 24, 2025

  ABSTRACT: All charged particles possess electrostatic field energy. The gravitational acceleration generated by this energy form has been theoretically predicated but to date it has not been experimentally confirmed. We show how a hollow electrical insulator with electrons inside the hollow space can be employed in a torsion balance instrument to measure this effect.