Image: Beckman Model D Oxygen Meter with infant incubator 73666474jf

Description: Photograph of Beckman Model D Oxygen Meter in Use with an Infant's Incubator This nurse is monitoring the oxygen levels of a prematurely born infant in an incubator or "isolette", 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. Published without a copyright notice in Beckman Feedback, July 1959 (box 44, folder 33)
Title: Beckman Model D Oxygen Meter in Use with an Infant's Incubator
Credit: https://digital.sciencehistory.org/works/5d86p027h
Author: Kassler Studios
Permission: This work is in the public domain in the United States because it was published in the United States between 1928 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No