The Principles of Biology, Volume 2 (of 2), by Herbert Spencer 67282 [author: Herbert Spencer] [Link: https://www.gutenberg.org/6/7/2/8/67282] [Files: 67282-0.txt; 67282-h.htm] Thanks to Karin Spence, Tim Lindell, Adrian Mastronardi, Josep Cols Canals and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/American Libraries.) Regards, Al