Experiments with air ions on the trachea

Man regularly encounters changing environmental conditions. Some of these changes are severe involving extreme discomfort, while others are so subtle as to pass unnoticed. Air ionization is one factor of environment that is properly classified as a subtle change for most people. Few are consciously aware of any change in air ionization, yet the physiological importance of air ions to the function of the respiratory system has been recently quantitatively demonstrated.1