2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126546The historical roots of the word plasma are recalled. It is suggested that possibly at the beginning of the researches in low-pressure gas discharges the driving motivation was related to the psychic phenomena investigated by Sir William Crookes.3 pages, no figures, submitted to reviewHistory and Philosophy of PhysicsPlasma Physicstext