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Mercury-Atlas 6
Astronaut John Glenn tests balance mechanism performance

Astronaut John H. Glenn Jr.'s balance mechanism (semi-circular-canals) is tested by running cool water into his ear and measuring effect on eye motions (nystagmus). This view is labeled a modified calonic test.



Catalog Date: 12 December 1961
Film Type: 8x10
NASA image: S61-04564


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