SCIENTIFIC INVESTIGATIONS
Be that as it may, the Coulon case has awakened the attention of researchers who have been able thus, after various experiences and studies, to establish, in strictly scientific and indisputable form, the influence of terrestrial radiations on subjects in "contact" with the soil and their diminution to annihilation on "isolated" subjects. We cannot, in this brief article, to avoid it becoming a small treatise, expose in detail and completely all the experiences realized and all that is known on the subject. We will limit ourselves, then, to exposing the essential and in synthetic form.
Atmospheric Electrical Tension
We know, first of all, that atmospheric electrical tension increases by almost one volt for each centimeter of height from the soil and, consequently, in a subject of 1.60 m. of height, there exists a potential difference between head and feet of 160 volts, difference that, if the subject is in "contact" with earth, gives origin to a weak current that cannot fail to exercise its influence in the organism of the subject.
If, on the contrary, the subject is "isolated," this current due to the potential difference as well as to the charge of electricity produced by vital activity, by muscular movements, frictions between clothing and skin, cannot be discharged into earth. A simple experience demonstrates this very clearly.
Experimental Verification
If one makes a subject sit on an isolating platform and rubs him with a brush, the soil is charged with an electrical potential sufficient to make contract, in appreciable form, if he approaches his finger to the gastrocnemius muscle of a frog previously prepared. Said contraction does not manifest if the subject is not isolated from earth, which demonstrates that the increase of electrical potential is discharged toward earth.
DR. JULES RÉGNAULT'S ADVANCED RESEARCH
A similar demonstration, but much more sensitive, has been given by Dr. Jules Régnault, serving himself with an apparatus denominated electrometer, of Cav. Alberto de Vita, of Rome. This thermoionic tube apparatus is so sensitive that it indicates oscillations in the needle of a milliammeter, when one caresses a cat, and variable from 6 to 15 meters distance according to the fineness of the animal's hair. Thus Dr. Régnault relates to us his experiences with said apparatus: