File:330-ps-7224-usn-646598 16709127926 o.jpg

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English: 330-PS-7224 (USN 646598): Captain Norman Lee Barr, MC, USN, listens and studies heart and lung activities of the patient in the laboratory. The large dial on the top of the radio receiver registers the heart beat. The traces on the paper in the doctors hand is the electrocardiogram. Heart and respiratory sounds come through the radio speaker at left, March 1955. (3/4/2015).
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Source National Museum of the U.S. Navy
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This image is a work of a U.S. military or Department of Defense employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain in the United States.

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current19:32, 9 July 2018Thumbnail for version as of 19:32, 9 July 20182,928 × 2,200 (720 KB)Tyler de Noche (talk | contribs)

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