This nurse is monitoring the oxygen levels of a prematurely born infant in an incubator, to provide just the right oxygen mixture. Too little oxygen has obvious repercussions, but until the 1950s doctors did not realize that too much oxygen caused retrolental fibroplasia, resulting in blindness.
Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety, and preventing blindness in newborn babies.
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“Beckman D2 Oxygen Meter in Use with an Infant's Incubator,” 1950–1959. Beckman Historical Collection, Box 55, Folder 72. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/p8418n23d.
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