(ὁδόμετρον; hodómetron). Hero (Dioptra 34) and Vitruvius (10,9) describe a mechanical device for distance measurement on land in which a connection of endless screws and sprockets mounted on different levels, driven by a cart wheel, transmits each rotation of the wheel to a display system in a retarding manner (Hero: pointer; Vitruvius: falling balls). The hodometron was sufficient for one day trip and then had to be put back to the initial position. Vitruvius knew of a corresponding device for sea trips based on a bucket wheel.
Cite this pageOlshausen, Eckart (Stuttgart), “Hodometron”, in: Brill’s New Pauly, Antiquity volumes edited by: Hubert Cancik and , Helmuth Schneider, English Edition by: Christine F. Salazar, Classical Tradition volumes edited by: Manfred Landfester, English Edition by: Francis G. Gentry. Consulted online on 27 January 2021 <http://dx.doi.org/10.1163/1574-9347_bnp_e516030>
First published online: 2006
First print edition: 9789004122598, 20110510
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