Speedometer.
—Every automobile should be equipped with a good speedometer. Speed limits are known to most drivers and if constantly stared in the face by good clear speedometer numbers they are not so likely to exceed them as if they depended entirely upon a sense of velocity, which is merely relative at the best. A motorist is driving along a country highway at a speed of 25 miles an hour, say, when he comes to a village with a sign out, “Speed Limit, 15 miles.” He slacks to that speed by speedometer but feels he is only traveling 5 or 10 miles an hour. Railroad companies found it advantageous to equip their locomotives with self-registering speedometers in order to reduce the number of accidents due to speeding. The automobilist with a speedometer before him has no excuse, at least, for speeding.