A Daily History of Holes, Dots, Lines, Science, History, Math, Physics, Art, the Unintentional Absurd, Architecture, Maps, Data Visualization, Blank and Missing Things, and so on. |1.6 million words, 7500 images, 4.9 million hits| Press & appearances in The Times, Le Figaro, Mensa, The Economist, The Guardian, Discovery News, Slate, Le Monde, Sci American Blogs, Le Pont, and many othr places… 5000+ total posts since 2008.
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JF Ptak Science Books Quick Post
The answer is “yes”, the sign is real; the question though is where does it work?
[Source: Popular Science Monthly, July 1940.]
The location, according to the article, is Lynchville, Maine, which is about 50 miles northeast of Portland.