MAN'S ADAPTATION TO INCREASING ALTITUDE

The barriers to man's ascent to higher altitudes are included in reduced barometric pressure, velocity, vision and radiations. His adaptation has been accomplished by the application of physical and physiological principles to provide him with preventive and compensatory means to meet the barriers. As continued development will permit ascent to ever increasing altitudes adaptive means will be found and provided so that human frailties will not be the limiting factors.