It is the sudden lowering of temperature on the surface of the body or in the lungs and the resulting contrast between the heat within and the cold outside, that causes the increased manifestation of electromagnetic energy in the system.
This, together with the acceleration of the entire circulation, undoubtedly accounts for the tonic effect of cold-water applications such as cold packs, ablutions, sprays, sitz baths, barefoot walking, etc., and for the wonderfully bracing influence of fresh, cold outside air.
The energizing effect of cold air may also explain to a large extent the superiority of the races inhabiting the temperate zones over those of the warm and torrid southern regions.
To me it seems a very foolish custom to run away from the invigorating northern winters to the enervating sameness of southern climates. One of the reasons I abandoned, with considerable financial sacrifice, a well-established home in a Texas city which is the Mecca of health-seekers, was that I did not want to rear my children under the enervating influence of that beautiful climate. I, for my part, want some cold winter weather every year to stir up the lazy blood corpuscles, to set the blood bounding through the system and to freeze out the microbes.
In our Nature Cure work we find all the way through that the continued application of warmth has a debilitating effect upon the organism, and that only by the opposing influences of alternating heat and cold can we produce the natural stimulation which awakens the dormant vital energies in the body of the chronic.
Increase of Oxygen and Ozone
The liberation of electromagnetic currents through cold-water applications has other very important effects upon the system besides that of stimulation.
Electricity splits up molecules of water into hydrogen, oxygen and ozone. We have an example of this in the thunderstorm. The powerful electric discharges which we call lightning separate or split the watery vapors in the air into these elements. It is the increase of oxygen and ozone in the air that purifies and sweetens the atmosphere after the storm.
In acute as well as in chronic disease, large amounts of oxygen and ozone are required to burn up the morbid materials and to purify the system. Certain combinations of these elements are among the most powerful antiseptics and germicides.
Likewise, the electric currents produced by cold packs, ablutions and other cold-water applications split up the molecules of water in the tissues of the body into their component parts. In this way large amounts of oxygen and ozone are liberated, and these elements assist to a considerable extent in the oxidation and neutralization of waste materials and disease products.