Hat tip to Dennis Walter for sending me a link to this beautiful circa 1944 “Chart of Electromagnetic Radiations” by W.M Welch Scientific Company. According to Flickr user llnl photos, it was found, “tucked away in the back of an unused office years ago, but now hangs framed in a high-traffic hallway populated by Lawrence Livermore engineers.”
Being a big fan of vintage maps and technical illustrations, I would love to dedicate a wall of my radio room to this chart.
Click on the photo above to enlarge this image to 1600 × 1113.
You can download the original, high resolution image by visiting llnl photos’ Flickr page.
Ugh. Seems like every man and his dog are selling these (at hugely overblown prices) on Etsy and elsewhere.
Isn’t basic copyright sacred any more. It’s one thing to d/l and print yourself for your own use, but commercial exploitation really annoys me.
W. M. Welch Scientific Company furnished a 32 page Key for the Chart Of Electromagnetic Radiations. Does anyone know where I may secure a copy of that Key? Thank You@! John M. Habak e-mail: jmhrsh@hotmail.com
I have one of these hanging in my home. Does anyone know the value?