This is a nice article. I know of a couple other resources. First and foremost is the site modernnomographs [1]. Popular mechanics once included a perpetual ca

This is a nice article. I know of a couple other resources. First and foremost is the site modernnomographs [1]. Popular mechanics once included a perpetual calendar nomograph [2]. Possibly pynomo [3], a python tool to make nomographs, would also be interesting to others. [1]: http://www.myreckonings.com/modernnomograms/ http://www.myreckonings.com/modernnomograms/ [2]: https://books.google.com/books?id=mN4DAAAAMBAJ&lpg=PA699&pg=PA699#v=onepage&q&f=false https://books.google.com/books?id=mN4DAAAAMBAJ&lpg=PA699&pg=... [3]: http://pynomo.org/wiki/index.php/Basics http://pynomo.org/wiki/index.php/Basics