Crombie grants that some of the older science became more accessible via printing; but does he not simply ignore the dynamic of later medieval science towards visual formulation? For, to translate force and energy into visual graphs and experiments was, as it continued to be until the discovery of electro-magnetic waves, the heart of modern science. Today, visualization is recessive and this makes us aware of its peculiar strategies during the Renaissance. The invention of typography confirmed and extended the new visual stress of applied knowledge, providing the first uniformly repeatable commodity, the first assembly line, and the first mass production. * The invention of typography, as such, is an example of the application of the knowledge of traditional crafts to a special