"UNZICKER TRICYCLE, 1878 U.S.N.M. No. 309256... photograph No. 784-B; plate 10, b. ...Patent No. 204636... issued... 1878, to Otto Unzicker... for an "improvement in velocipedes" ...a tricycle propelled by the back-and-forth motion of the wooden handle bars. The bars, which also steer the tricycle, are fastened to the upright arm of a bell-crank attached to the top of the fork. Motion of the bell-crank is transmitted by connecting rods to cranks on the ends of the front-wheel axle. ...The sidesaddle places the rider on the left side of the vehicle. Because of the mechanical disadvantage accompanying this method of propulsion, and the relatively narrow track of the rear wheels... a full-sized vehicle would not have proven very satisfactory on the poor roads of the nineteenth century. ...Unzicker's patent was assigned... to the same Adolph Shoeninger associated with Marble."