Osservazioni di microvariazioni di raggi cosmici in corrispondenza al passaggio di perturbazioni frontali

Peculiar small variations of the total component of cosmic rays have been observed during atmospheric cold front perturbations. These variations have an amplitude of the order of 1% and a dur a t i o n of a few quarters of an hour. The possible causes are discussed and it is concluded on t h e possibility of an effect of t e m p e r a t u r e or of atmospheric electricity.