Accurate gage ofthelocomotive power, active and passive, are realized via theintelligent kilowatt-hourmeter, making the scientificmanagement oflocomotive power possible at the same time.
In her outstanding book on photographer Edward Muybridge, Rebecca Solnit recounts a death, during the first running of a passenger railroad in 1830, because a man could not step off the track in time from a long-seen locomotive going perhaps 30 miles an hour.