title: The origins of Entwicklungsmechanik.
authors.affiliation: Department of Philosophy, Arizona State University, Tempe 85287.
authors.forename: J
authors.initials: J
authors.lastname: Maienschein
mesh_terms: D000663:Amphibians / Q000196:embryology; D000818:Animals; D004626:Embryology / Q000266:history*; D005060:Europe; D049672:History, 19th Century; D049673:History, 20th Century; D012617:Sea Urchins / Q000196:embryology