The Biological Problem of To-day, by Oscar Hertwig 37221 [Subtitle: Preformation Or Epigenesis? The Basis of a Theory of Organic Development] [Translator: Peter Chalmers Mitchell] [Link: http://www.gutenberg.org/3/7/2/2/37221 ] [Files: 37221.txt; 37221-8.txt; 37221-h.htm] Thanks to Bryan Ness, Josephine Paolucci and the Online Distributed Proofreading Team at http://www.pgdp.net. (This book was produced from scanned images of public domain material from the Google Print project.) Many thanks Janet