Note 31 — ERRATUM. p. 78, note 1, l. 19; for “were in orders, for the most part in holy orders;” read “were generally speaking in holy orders;”

Not only movement but also formative activity. The ἀρχὴ τῆς κινήσεως is the efficient cause of Aristotle; for him final causes direct motion—the οὗ ἕνεκα. Thus dialectic was taken for dynamics. Even Kant confused cause and effect with reason and consequence in hypothetical propositions (Benn). Caverni (Storia del methodo sperimentale in Italia, 1891-5) says that Jordanus Nemorarius (of Borgentreich near Warburg, d. 1236) made the great advance of extending the static physics of the ancients to establish dynamics; and that he introduced the word “moment.” In a cursory survey of the two works of Nemorarius which we have in Cambridge I have not been able to verify this statement; the notion I have found but not the word itself.