This photograph shows a resistograph designed by Peter V. Karpovich while a member of the physiology department at the International YMCA College, now called Springfield College. Karpovich used this machine to test water resistance faced by swimmers. It may have been a precursor to the natograph, a later invention by Karpovich. At the base of a machine is a small diorama of a pool with a doll lying in the water to simulate how the machine connects to the swimmer. For more information on Peter V. Karpovich, see: https://springfield.as.atlas-sys.com/agents/people/571
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