November 15th, 2011 Best birthday cake 2011 Published on November 15th, 2011 | By: firstname.lastname@example.org Are you sure you wish to continue? I am ashamed I overlooked the 20th birthday of the Oughtred Society. Picture via the International Slide Rule Museum. Back to Previous Page « « Previous Post     |    Next Post » » Tags: International Slide Rule Museum, Oughtred Society, slide rule Related Posts No related posts found! Leave a Reply Cancel replyYou must be logged in to post a comment.