The roadometer was a 19th-century device like an odometer for measuring mileage, mounted on a wagon wheel. One such device was invented in 1847 by William Clayton, Orson Pratt, and Appleton Harmon, pioneers of the Church of Jesus Christ of Latter-day Saints.
The roadometer was a 19th-century device like an odometer for measuring mileage, mounted on a wagon wheel. One such device was invented in 1847 by William Clayton, Orson Pratt, and Appleton Harmon, pioneers of the Church of Jesus Christ of Latter-day Saints.
Source: Wikipedia "Roadometer (odometer)" · CC BY-SA 4.0
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