SchlagwortAcademy;Albertus Magnus;astrology;Bachelard, Gaston;Bell, John Stuart;Boyle, Robert;Carter, Brandon;Corpus hermeticum;Democritus of Abdera;demon;Empedocles of Acragas;essence, in Aristotle;Fermat, Pierre;field, electromagnetic;Galen of Pergamon;gauge theories;Haefele-Keating experiment;Heraclides of Pontus;Hermes Trismegistus;Hippocrates of Cos;hypotheses;invariance