Encyclopedia article on cotton spinning from Brockhaus' Konversations-Lexikon, covering the preparatory stage of cotton processing. It describes ginning machines (saw gin and the Macarthy knife gin), then the opening and cleaning machines: the Klopfwolf (beater), the Crighton opener, and the scutcher or lap-forming machine (Schlag- und Wickelmaschine), including a combined pneumatic-feed system. It ends with cross-references to the articles on spinning and the cotton industry. A plate shows six engravings of the machines.