When Isaac Newton wanted to recall a passage in a book, he'd fold the corner of the page to the sentence in question. I just came across this digitized example of a book from his library. It shows the folds very clearly -- sometimes more than one on a page:
http://lhldigital.lindahall.org/cdm/ref/collection/philsci/id/6 Linda Hall Library, LHL Digital Collections (Kansas City, Missouri) Marsham <http://lhldigital.lindahall.org/cdm/search/searchterm/Marsham>, John <http://lhldigital.lindahall.org/cdm/search/searchterm/John>, 1676<http://lhldigital.lindahall.org/cdm/search/searchterm/1676> , Canon <http://lhldigital.lindahall.org/cdm/search/searchterm/Canon> Chronicus <http://lhldigital.lindahall.org/cdm/search/searchterm/Chronicus> Aegyptiacus<http://lhldigital.lindahall.org/cdm/search/searchterm/Aegyptiacus> [Isaac <http://lhldigital.lindahall.org/cdm/search/searchterm/[Isaac> Newton's <http://lhldigital.lindahall.org/cdm/search/searchterm/Newton's> copy] <http://lhldigital.lindahall.org/cdm/search/searchterm/copy]>. [Leipzig, 1676, 2nd rev. edition] "In *Canon Chronicus Aegyptiacus, Ebraicus, Graecus & Disqvisitiones*, John Marsham presents his chronology of events described in the Bible along with other, historical events. The Library owns two copies of this esoteric book. This copy was once owned by Isaac Newton, and shows his habit of folding pages to point out topics of significance. The other copy was not folded and can be used as a reference for comparison." Karen 4/21/2014 Karen Reeds, co-ringleader, Princeton Public Library Origami Group. Affiliate of Origami USA, http://origamiusa.org/ We usually meet 2nd Wednesday of the month, 6:30-8pm, 3rd floor. Free! We provide paper! All welcome! (Kids under 8, please bring a grown-up.) Princeton Public Library info: 609.924.9529 http://www.princetonlibrary.org/events/2013/11/origami-club awood...@princetonlibrary.org (Ann Woodrow) Next meeting, Wednesday May 16, 2014, 6:30-8pm karenmre...@gmail.com
