The Encyclopedia Americana (1920)/Wagon
WAGON, a four-wheeled vehicle for the transport of goods or passengers, drawn generally by horses. To enable the vehicle to turn as quickly and in as little space as possible, the fore pair of wheels are often made smaller than the hind pair, and to increase this advantage still further the axle of the fore-wheels is frequently fixed to the bottom of the vehicle by a swivel joint, in which case the shafts are attached to the fore-axle. The framework of the wagon is usually mounted on springs. See Carriage.