First notions of logic, by Augustus  De Morgan                         67017   [Subtitle: (preparatory to the study of geometry)]   [author: Augustus  De Morgan]   [Link: https://www.gutenberg.org/6/7/0/1/67017]   [Files: 67017-0.txt; 67017-h.htm] Thanks to Richard Tonsing and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Regards, Chuck