A cylindrical device for the controller application of magnetic fields to the human body comprises a closed box-shaped housing, made of a magnetically permeable material, of which the closing plugs of the opposed heads are provided with small teeth having a magnetic positive charge (+), made of a wear- resistant material, which have the double aim of perfectly maintaining in axis the cylindrical body with a permanent magnet through suitable hollow seats, further permitting its free rotation on its longitudinal axis with respect to said cylindrical device, so that the cylindrical device once applied strictly near a human body having an unstable electromagnetic voltage, due to an excess of positive (+) or negative (-) charge, is brought to automatically orientate itself, in order to present opposed to the body itself its face, having a magnetic charge with a sign opposite to that of the charge present in excess in the body, so that the uniform distribution of the magnetic charge on said face determines a magnetic field, which assists the bio-magnetic balancing and compensation action between human body and cylindrical device, permitting a rebalancing of the electromagnetic voltage in the body itself.Dispositif cylindrique pour lapplication maîtrisée de champs magnétiques au corps humain, comportant un boîtier fermé en forme de caisson, constitué dun matériau magnétiquement perméable, caractérisé en ce que les bouchons dobturation des bouts opposés sont munis de petites dents présentant une charge magnétique positive (+), constituées dun matériau résistant à lusure, qui ont pour double fonction de maintenir le corps cylindrique parfaitement coaxial avec un aimant permanent par lintermédiaire de sièges creux appropriés, tout en lui permettant en outre de tourner librement sur son axe longitudinal par rapport audit dispositif cylindrique, de telle sorte que le dispositif cylindrique, lorsquil est appliqué à proximité immédiate dun corps humain présentant une tension élec
