For those who may have forgotten the lessons of kinematics from high school, it is the branch of classical mechanics that "describes the motion of points, bodies, and systems of bodies without consideration of the causes of motion." This remarkable digital collection from Cornell University brings together 50 critical books and articles that tell the history of this fascinating subject. Most of the materials here are from the 19th and early 20th centuries, and they include "Kennedy's Mechanics of Machinery" from 1886 and "Durley's Kinematics of Machines" from 1907. Visitors can search the entire collection by keyword and date. They can also download each volume for offline consideration, if they so desire. One item that should not be missed is Charles Babbage's seminal work "On a Method of Expressing by Signs The Action of Machinery".