Marble driven, wooden, binary adding machine Leave a Reply This is great – I saw this marble driven, wooden, binary adding machine on my friend Doug Clinton’s ‘blog and I just had to add it here. ….. Links for this article: Recovered link: https://horkan.com/2007/09/06/wooden-binary-adding-machine Archived link: https://web.archive.org/web/20100715133815/http://blogs.sun.com/eclectic/entry/wooden_binary_adding_machine Original link: http://blogs.sun.com/eclectic/entry/wooden_binary_adding_machine