(p. 223) Though power looms had existed, at least in concept, for centuries (under his sketch for one, Leonardo himself wrote, “This is second only to the printing press in importance; no less useful in its practical application; a lucrative, beautiful, and subtle invention”), there was little interest in them so long as virtually all the available yarn could be turned into cloth in cottages. This fact reinforced the weaver’s independence; but it also encouraged another group of innovative types who were getting ready to put spinning itself on an industrial footing.
Rosen, William. The Most Powerful Idea in the World: A Story of Steam, Industry, and Invention. New York: Random House, 2010.