CHAPTER I
Source: Arthur T. Woods, Albert W. Stahl. Elementary Mechanism: A Textbook for Students of Mechanical Engineering. D. Van Nostrand, New York, 1885. Wikimedia Commons, Public Domain Mark. The text is output of the marker models by Datalab, cleaned by raw2md, and the modified AI Pubs OpenRAIL-M license of the models applies to it: MODEL_LICENSE. The whole result is book.md on GitHub.