Arithmetical books, by Augustus De Morgan 79706 [Subtitle: from the invention of printing to the present time] [Author: Augustus De Morgan] [Link: https://www.gutenberg.org/ebooks/79706] note: link will be active within two hours of posting. Thanks to deaurider 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, Al