During the 19th century, bedrooms that were papered with poisonous, arsenical-green wallpaper tended not to have bedbugs.
Source: Bill Bryson, At Home, page 315… Read More
Serialized radio dramas became popular in the 1930s. They were called soap operas, because they were sponsored by makers of cleaning products, among them P and G’s Oxydol, Palmolive Beauty Soap, and Colgate Tooth Powder.