As seen from front.. Where the dotted lines marked ‘1’ are shown, bend it at right angles from you; where the dotted lines marked ‘2’ are shown, bend at right angles outwards; it will, when looked at edgeways, appear like this:
As seen from above.. Paint it black on both sides, and gum the ends (2 to 3) on the screen just above the boiler end. The lever (4, 5) is to work in this on its centre (4). A narrow piece of thick card, about one inch and a quarter long, will do for the lever, while a pin inserted at 4 forms the centre on which it moves.
We then fix our ‘steam-gauge.’ It consists of a circular piece of white medium card, on which is shown the numbers 10, 20, 30, 40, etc., to indicate the pressure. A pin through the centre connects it with the steam-funnel. The pin represents the steam-pipe. We now require taps, which we make out of pins, by cutting off the heads and bending them at right angles about one-eighth of an inch from the headless end. The point is pushed through the card, leaving outside about one-eighth of an inch in addition to the bent part, as shown in accompanying [cut]. Above this we gum another piece of bent pin this size
and shape, for handle of tap. Two or three of these should be placed on the boiler end, at the left side above the furnace.
