Antirachitic Properties Imparted to Inert Fluids and to Green Vegetables by Ultra-Violet Irradiation

Ultra-Violet Irradiationdiet (Sherman-Pappenheimer), developed rickets to about the same degree as those which had not been exposed to the irradiated air (Table I).The experiment was repeated, placing the lamp at half the distance (6 inches) and subjecting the animals to three daily periods of 14 hours each.The jar was lined with paper so as to preclude the possible action of the rays on the glass, and calcium chloride was placed in the jar to absorb the moisture.Once more the result was negative as will be noted in Table I.TABLE I.Attempt to Prevent Rickets by Exposing Rats to Irradiated Air.