912 EDWARD C. SCHNEIDER 



ment in the general condition. Compensated valvular lesions and mild 

 cases of myocarditis were also favorably influenced. 



Because the adaptive compensations to high altitudes are slow in their 

 development, the newcomer should remain quiet for a day or two. If 

 symptoms of '^altitude sickness" occur rest in bed with windows open is 

 advisable and at least a day of quiet after all symptoms have disappeared. 

 During the first days it is best to make no exertion which causes any 

 considerable dyspnea. 



The changes in the breathing and the blood are permanent in character, 

 and do not diminish during a protracted residence at the high altitude. 

 Changes in pulse rate and in the rate of blood flow are less permanent, 

 and tend to disappear with acclimatization. On returning from a high 

 to a low altitude the changes in the respiration and blood are maintained 

 for a time as an "after effect." The longer the residence at the high 

 altitude the more prolonged the period of "after effect." During this 

 period the individual may gain in weight and health. 



