A Things of Science unit from July, 1961. Unfortunately the booklet was not in pristine shape. The front page of the booklet looked literally moth eaten. Nonetheless, I scanned it and tried to clean it up as best I could.
Interesting bit of material science here. Some history, chemistry, and a bunch of rubber samples to test.
Here is the booklet:
Things of Science #249 — Synthetic Rubber
More Things of Science scanned here.
The things:
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