Didn’t realize plexiglass existed in the 1930s!
Wikipedia says it was first marketed only 3 years earlier so it was pretty new https://en.wikipedia.org/wiki/Poly(methyl_methacrylate)
alt Hacker News
Wikipedia says it was first marketed only 3 years earlier so it was pretty new https://en.wikipedia.org/wiki/Poly(methyl_methacrylate)