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Photographs of Naval Corpsman Arthur B. "Art" Guntner and his career working with the Johnsville Centrifuge at the Aviation Medical Acceleration Laboratory of the Navy Air Development Center Warminster. Capable of generating 40Gs, the Centrifuge was used throughout the early American space program for many different scientific simulations and experiments purposes including as a part of the training of every Mercury, Gemini, and Apollo astronaut.