"GREENE AND DYER MONOCYCLE, 1869 U.S.N.M. No. 312832... photograph No. 41054; plate 9. ...Allen Greene and Elisha Dyer... were granted patent No. 91535... 1869, for an "improvement in velocipede." This incomplete monocycle... represents their invention. ...[T]he vehicle crashed badly on its first trial run, and proved to be unsatisfactory. The 24 spokes and the felloe are of wood, while a thin metal band attached to the felloe serves as a tire. ...The bowed spokes radiating in from the rim are alternately connected to each side of the wheel hub. Each of these sides is composed of two metal discs bolted together, with 12 of the spokes clamped between each pair of discs. Within the center of the wheel a framework is suspended from short shafts extending inwards from the two sides of the hub. A swinging seat for the operator is attached to the framework. Small hand cranks are also attached to the framework near the short shaft extensions, but how they worked is not clear. The patent specifications refer to hand cranks and foot treadles jointly providing the motive power, but no treadles exist now, and the cranks are inoperative. ...[I]t is doubtful if the vehicle ever was completed."