NASA Project Mercury astronaut candidate Captain Donald K "Deke" Slayton, USAF, undergoes Equilibrium and Vibration test. Subject seated on a chair which rotates simultaneously on two axes. He maintains the chair on an even keel by means of a control stick with and without vibration, normally and blindfolded.
NASA Project Mercury astronaut, Hal Crandall undergoes a flack and cold pressor test at Wright-Patterson Air Force Base, Ohio. Subject blows into a tube for a given period of time to support a column of mercury. He also plunges his feet into a tub of ice water. Doctor examines pulse and blood pressure before and during the test.
NASA Project Mercury astronaut candidate Lt. Hal R. Crandall, USN undergoes a treadmill test at Wright-Patterson Air Force Base, Ohio. Subject walks at a constant rate on a moving platform which is elevated one degree each minute. Test continues until heart beat reaches 180 beats per minute. Hal Crandall walks bare feet on the treadmill.
NASA Project Mercury astronaut, Archie T Iddings undergoes Harvard step test and tilt table test at Wright-Patterson Air Force Base, Ohio. Subject steps 20 inches to a platform once every two seconds for five minutes. He also lies on steeply inclined table for 25 minutes to measure ability of the heart to compensate for body in an unusual position for an extended time. Doctor examines him.
NASA Project Mercury astronaut, Major Harold W. Christian, Jr.,USAF, undergoes an Equilibrium test at Wright-Patterson Air Force Base, Ohio. Subject is seated on a chair which rotates simultaneously on two axes. He maintains the chair on an even keel by means of a control stick with and without vibration. Subject is blindfolded.
NASA Project Mercury astronaut candidate, Major John H Glenn,Jr., USMC, undergoes a centrifuge test at Wright-Patterson Air Force Base, Ohio.
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