Causality : from Enciclopedia della scienza e della tecnica, vol. 2, Milan, 1964, Arnoldo Mondadori ed. : text given to the partecipants in the 14th General meeting of the Italian society of geophysics and meteorology, Genoa, 14th-16th April 1966 / Ludovico Geymonat ; English translation by Gianna McClintock