The Little Wheel That Could

Without it, distance and even speed would be nothing more than a guess. 2014 Mazda CX-5 odometer/trip meter. It is a simple a simple device with a row of spinning numbers under the speedometer (digital nowadays for many) that measures how far your car has traveled since it was new, or how many miles you've covered on a trip. Called an odometer, its modern interpretation was used for the first time on this date in 1847 by a Mormon pioneer, William Clayton to measure the distance a covered wagon covered in a single day.