MEASUREMENT OF WATER VAPOR LOSS THROUGH HUMAN NAIL <em>IN VIVO</em>.

A capsule is described which can be used for the measurement of the water vapor loss of the nail with the aid of the same instrumentation that has been used for the measurement of the water vapor loss of skin. The effective area of the described capsule has been determined applying an electric analog. The specific water permeability of the nail plate appeared to be independent of nail thickness in the finger nails of a healthy volunteer. [ABSTRACT FROM AUTHOR]