TO THE EDITOR: We followed with great interest the recent exchanges between Drs. Teppema and Berendsen (4) on one hand and Dr. Swenson on the other hand regarding the mechanisms of effects of acetazolamide (AZ) in the prevention of Acute Mountain Sickness (AMS) (3). One of the essential questions raised by both parts is the action of AZ on central and peripheral chemosensitivity, respectively. ...

For six years we have been practising abdominal resection for Hirschsprung's disease. The method is also known as segmental resection, anterior resection or State operation. The operative technique has, apart from certain small alterations, always remained the same. In the application of this procedure certain aspects have been revealed which are important for the theoretical interpretation of ...

The process of adaptive enzyme formation has aroused considerable interest through the years. In view of the interesting results of several recent investigations of the effects of radiations on adaptive enzyme formation (Spiegelman et al., 1951; Swenson and Giese, 1950; Brandt et al., 1951; Billen and Lichstein, 1952; Swenson, 1950) it seemed desirable to investigate the effects of x-rays on th...