2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83828The experiment is described which shows that Coulomb interaction spreads with a limit velocity and thus this kind of interaction cannot be considered as so called "instantaneous action at a distance".ReVTeX file, 13 pages, 8 figures, to be published in ``Hadronic Journal"Classical PhysicsGeneral Physicstext