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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 reason for the rotation was a cause of much scientific debate in the ten years following the invention of the device, [1] [2] but in 1879 the currently accepted explanation for the rotation was published. [3] [4] Today the device is mainly used in physics education as a demonstration of a heat engine run by light energy.
Roadometer may mean: Roadometer (odometer) , an early device like an odometer for measuring mileage, towed by a wagon, invented in 1847, by William Clayton , a Mormon pioneer. A type of Drivotrainer , one of these was called a Roadometer .
The Roadometer used two gears and was an early example of an odometer with pascaline-style gears in actual use. [12] In 1895, Curtis Hussey Veeder invented the Cyclometer. [13] [14] The Cyclometer was a mechanical device that counted the number of rotations of a bicycle wheel. [15]
Sir William Crookes (/ k r ʊ k s /; 17 June 1832 – 4 April 1919) was an English chemist and physicist who attended the Royal College of Chemistry, [1] now part of Imperial College London, and worked on spectroscopy.
An example of a Crookes radiometer.The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.