Keywords: Signature of Adriaen Verwer 1687.jpg en Signature of Adriaen Verwer from his copy of the Philosophiae naturalis principia mathematica of Isaac Newton 1687 now in the Universiteitsbibliotheek Utrecht 2013-07-08 19 06 59 http //bc library uu nl/node/667 Adriaen Verwer 1655 “1717 PD-old-100 Collections of Utrecht University Library Uploaded with UploadWizard Signatures |