MAKE A MEME View Large Image OpticalGlass 002.jpg A group of five large pieces of glass averaging nearly 1000 lbs each in weight shown here Although the glass was two feet thick it was possible to see distinctly through it Window glass of this thickness would be almost ...
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Keywords: OpticalGlass 002.jpg A group of five large pieces of glass averaging nearly 1000 lbs each in weight shown here Although the glass was two feet thick it was possible to see distinctly through it Window glass of this thickness would be almost opaque These pieces would be inspected carefully before they were cut in order to save the largest possible piece of good glass National Institute of Standards and Technology 1919-01-01 National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Glass
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