The seat is made from a box eighteen inches wide and high and arranged with back and sides which can be built up six inches above the seat as shown in Fig. 10. This seat is to be securely attached to the board with long screws driven up through the under side of the board and into the lower part of the box. The steering-shaft and wheel are arranged about one foot in front of the seat. This is a shaft of hard-wood (such as a curtain-pole or any good tough stick) about one inch and a half square or in diameter. It mounts on a block of wood which is screwed fast to the large board and provided with a hole through which the shaft will pass so that it will extend down through the large board. A collar of wood or iron is slipped down over the shaft and screwed fast to it so as to prevent it from slipping down too far. Another collar is provided and made fast at the bottom to prevent the steering-cable from slipping off. The arrangement of the collars and wire is shown at Fig. 11 A. At the top of the shaft a small wooden wheel should be slipped on over a shank that may be cut down in size to fit the opening in the wheel; and with a screw the wheel is to be made fast to the shaft so that it is held securely in place.
The rear wheels are attached to an axle that in turn is bolted fast to a bar of wood eighteen inches long and two by three inches in thickness. These wheels are held in a fixed position, and the bar to which they are attached is located about a foot in from the end of the long board. The front axle is bolted to a movable bar which is held to another bar by a king-bolt, so that the lower axle-bar can turn in the same way as on a wagon. The bar to which the axle and movable bar are attached is located about one foot from the front of the long board. This arrangement can be seen at Fig. 12, which is a front view showing axle and fifth wheel, as the turn-plate between the axle-tree and the body of the wagon is called. The fifth wheel is made of two pieces of tire-iron, one fastened to the under side of the fixed bar, the other to the top of the axle-tree, so that when greased the lower part will turn easily.
Flexible wire-cable or very strong twine should be used for the steering-gear. The ends are made fast to the axle-tree as shown at A in Fig. 12. Several wraps of the wire or twine are taken about the lower end of the shaft, and the wire passes through a hole to prevent it from slipping. The wire should be attached first at one end of the tree, carried to the shaft, and given several turns, then passed through the hole. Several more turns are to be made above the hole, then the loose end should be attached to the other end of the axle-tree. If a small turn-buckle can be had, make it fast to the wire and axle at one end so as to draw the wire taut and hold it in place, for the tighter the wire the better the shaft will act when turned by the wheel.