1940 Print Wright Field Riverside Ohio Heim Blood Chart Hemoglobin Aviation FZ2 XEI4 during World War I

during World War I

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1940 Print Wright Field Riverside Ohio Heim Blood Chart Hemoglobin Aviation FZ2 XEI4 during World War IThis is an original 1940 halftone print of Dr. J. W. Heim taking a blood sample of a pilot at Wright Field in Riverside, Ohio. The caption writes, "This chart illustrates the atmosphere from the flight surgeon's point of view. Below, Dr. J. W. Heim takes a blood sample in a low pressure chamber at Wright Field, where the chart conditions are mechanically reproduced"CONDITION This 71+ year old Item is rated Near Mint Very Fine+. Light aging throughout.