Monorail
a transportation system which utilizes but a single rail.
Experiments have been along two distinct lines-the type in which the car runs upon a single rail, but in which auxiliary guide rails of wheels are used, and the type which maintains its equilibrium by use of the gyroscope. Various models of the former type have been designed, in some of which the track is laid on the ground, in others the track is suspended. These systems have been used largely as novelties at various amusement parks or expositions. Three names which stand out prominently in the development of the gyroscope type are Louis Brenan, an Englishman, Paul Froelich, a German, and a Russian named Schelowsky. While this has never operated to any extent, in 1909 a model of the Brenan car, 14 feet long, with a carrying capacity of forty passengers, went through a series of tests before the Royal Society. The car was run on a circular track 220 yards in circumference, and Societ was able to maintain its equilibrium while in motion in spite of the efforts of its forty passengers to overturn it. This car weighed twenty-two tons, and power for both locomotive and for the gyroscopes was supplied by a gasoline motor. The gyroscope apparatus weighed less MONOTHEISM than 5 per cent. of the total weight of river, the Arkansas, Louisiana and Gulf, the car.
MONOTHEISM (mon'ō-the-izm), the term usually employed to denote a belief in the unity of the Godhead, or belief in and worship of one God. It is thus the opposite of polytheism.