Pedometer n. (Mech.) An instrument for including the number of steps in walking, and so ascertaining the distance passed over. It is usually in the form of a watch; an oscillating weight by the motion of the body causes the index to advance a certain distance at each step.
... was no doubt the father of the pedometer and the cyclorama, just as the boy is frequently father to the man. It was also no doubt the avant courier of the Dutch clock now used on freight cabooses, which not only shows how far the car has traveled, but also the rate ... — Nye and Riley's Wit and Humor (Poems and Yarns) • Bill Nye
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