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November 21, 1953


Author Affiliations

525 E. 68th St. New York 21.

JAMA. 1953;153(12):1115. doi:10.1001/jama.1953.02940290047022

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To the Editor:—  In reply to the letter by Dr. William S. Collens, we are very glad to extend to Dr. Collens, and to all others who have contributed to the use of the treadmill principle in the measurement of physiological response, due credit for any advances that may have led to the development of the equipment described in our article in The Journal, Sept. 12, 1953.Dr. Collens did permit Dr. Simon to see his equipment. In order to conserve space, however, we did not review the history of the treadmill as it is presently applied. Actually, the equipment described in our paper differed in some details from that of Dr. Collens. It was largely an outgrowth of the type of treadmill used for many years in the laboratory of Dr. Eugene DuBois of the Cornell University Medical College. Our purpose in describing the equipment in some detail was

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