From this signal-box the signal shown in Fig. 371 can be worked in a very simple manner. Fig. 377 shows the arrangement. Through a hole, A, in the floor fits a wooden lever, B C. Pass the thread belonging to the signal through a small hole in the side of the box, then through a small screw-eye at O, and tie it to the end of the rod. When the lever, B, is pushed over the signal arm is lowered.
A small nail is put through the lever just above A, to act as a fulcrum. The side F (Fig. 377) may have large windows which open to enable the child to insert his hand and push the lever. If the signal-post is set up some distance away from the signal-box, it may be found necessary to add another weight.
[CHAPTER XIII]
LIGHTHOUSE, TRANSPORTER BRIDGE
A Lighthouse (Plate XVI). This lighthouse is similar to one called the Gull Island Light in Newfoundland. It is a hexagonal column and is therefore somewhat easier to make than a circular structure.
Fig. 378
Fig. 379