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Chart of Electromagnetic Radiations:1944 W.M Welch Scientific Company Poster

Jun 10, 2017

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This 1944 poster from the W.M Welch Scientific Company: “Chart of Electromagnetic Radiations” was found tucked away in the back of an unused office years ago, but now hangs framed the hallway of  Lawrence Livermore National Laboratory who put the image up on flicker.


See the image full screen here.

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