Eight Posts from November, 2017 (Informal TOC Update@ March 9, 2018) [Short-link ends ‘-8KE’]. » Screen Shot 2018-03-07 at 2.03.56 PM
The Story of the Real Canary in the Coal Mines 12/30/2016 in Smithsonian.com, under “SMARTNews”) by Kat Eschner. (click image to enlarge or link to access the article). PHOTO: “Mining foreman R. Thornburg shows a small cage with a canary used for testing carbon monoxide gas in 1928. (George McCaa, U.S. Bureau of Mines)“
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