A Things of Science unit from September, 1962 on silicones. Another one of the sort of “material sciences” units.
Here is the booklet:
More Things of Science scanned here.
People have long attributed meaning to flowers. Starting in Ottoman Turkey and popular in Victorian England, the language of flowers, also called floriography, is “a means of cryptological communication through the use or arrangement of flowers.” The meaning assigned to each flower varied, but a consensus emerged for the meaning of common flowers.