NASA Project Mercury candidate Captain James W. Wood, USAF, undergoes psychological and stress test at Wright-Patterson Air Force Base, Ohio. Doctors measure candidate's pulse and blood pressure before and after a "Flack" test. The subject must blow continuously into a tube to maintain a column of mercury at a specified level for as long as possible.
NASA Project Mercury astronaut candidate Major Hal W. Christian, Jr., USAF, undergoes psychological and stress test at Wright-Patterson Air Force Base, Ohio. Astronaut undergoes a treadmill test. Subject walks at a constant rate on a moving treadmill which is elevated one degree each minute. The test continues till heart beat reaches 180 beats per minute. Subject sits on a stool in between the tests.
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.
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