ABSTRACT
The first people who saw Gutenberg’s printing machine in action were duly struck with wonder. But at least they had a fair chance of understanding how this ingenious, revolutionizing invention of his worked. It was, after all, a relatively simple mechanism, based on well-known physical principles, not radically different from the tools most of his contemporaries used in their everyday life. Anyone who watched him at work in the shop could instantly see what he and his machine were doing.
