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.
Contact johnfptak at gmail dot com
JF Ptak Science Books Quick Post 
Following up on a post from yesterday on a make-it-yourself baseball history calcul-computer is this glorious spinning arrow pocket game board from 1876. An enthusiast could easily cut and paste their way to their very own baseball game for lost moments on the train or in line at the Piggly Wiggly. Enjoy.