Visual Illusions, by Matthew Luckiesh 36297 [Subtitle: Their Causes, Characteristics and Applications] [Link: http://www.gutenberg.org/3/6/2/9/36297 ] [Files: 36297.txt; 36297-8.txt; 36297-h.htm] Thanks to Bryan Ness and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive.) Many thanks Janet