NASA Project Mercury candidate Captain James Wayne Wood, USAF, undergoes psychological and stress test at Wright-Patterson Air Force Base, Ohio. Astronaut takes an instrument in his mouth and blows air. Doctor checks his pulse and pressure wearing a stethoscope. Subject's feet dipped in ice water.
NASA Project Mercury astronaut candidate Major Hal W. Christian, Jr., USAF undergoes treadmill test at Wright-Patterson Air Force Base, Ohio. He sits on a stool while doctors take readings from an instrument.
NASA Project Mercury astronaut candidate Captain Donald K. "Deke" Slayton undergoes treadmill test at Wright-Patterson Air Force Base, Ohio.
NASA Project Mercury astronaut candidate undergoes Equilibrium and Vibration test at Wright-Patterson Air Force Base, Ohio. The candidate must keep the seat in an upright position utilizing the control stick located between his knees. The test is conducted first without the blindfold, then with the blindfold. After a brief time, the seat begins to vibrate at higher and higher frequencies.
NASA Project Mercury astronaut candidate Captain James W. Wood, USAF, undergoes treadmill test at Wright-Patterson Air Force Base, Ohio. Astronaut candidate is seated on a stool over the treadmill while his resting pulse is taken. Doctor attaches an instrument on subject's arm to record his pulse rate. Astronaut candidate walks on the treadmill while doctor takes a reading on the instrument. He is to walk until his pulse rate reaches 180 beats-per-minute. The longer it takes to reach this maximum heart rate, the more fit the candidate is deemed to be, and the higher his score.
NASA Project Mercury astronaut candidate Captain Archie T. Iddings, USAF undergoes Equilibrium & Vibration test at Wright-Patterson Air Force Base, Ohio. Astronaut climbs up to a raised chair. Doctors help him strap up. Subject seated on chair with his feet dipped in ice water. He operates an instrument in hand. He blindfolds himself.
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