ONODA proved by Laewen-Trendelenburg's method that fresh radioactive thermal waters in Misasa Spa dilated the blood-vessel. WENSE repor ted that adrenal in was inactivated in the thermal water of Bad Gastein (Austria), its radon content being about the same of thermal water of Misasa . The authors conE i rmed by means of gas chromatography. procedures and operat ional condi tions were shown in Table 1 and 2, that radioactive thermal water of Misasa inhibited action of epinephrine in vitro, and the radon cotent of thermal waters promoting the inactivation of epinephrine.
