Breathing apparatus or use under water: purification of air by sodium dioxide using electricall drigvn circulating pump. Designed by Degrez and Balthazard. La Nature, Paris, 1900.

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Breathing apparatus or use under water: purification of air by sodium dioxide using electricall drigvn circulating pump. Designed by Degrez and Balthazard. La Nature, Paris, 1900.

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Size: 5607px × 3192px
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1900., air, apparatus, archival, archive, balthazard., breathing, circulating, degrez, designed, dioxide, diving, drigvn, electricall, historical, history, la, nature, paris, pump., purification, respirator, salvage, shipping, sodium, water: