Put the shaft in its place inside the boat, with the cross-piece resting across the pins in the fly-wheel, about half way. Mark the end of the shaft so that it will project an inch and three-quarters, and cut it off there. The bearing must now be made out of a strip of brass one-sixteenth of an inch thick, three quarters of an inch wide, and two inches longer than the width of the inside of the boat. In the middle of this bore a hole a quarter of an inch in diameter, and bend one inch of each end at right angles to the other part. In each bent piece drill two small holes, to screw them to the sides of the boat by. Slip a piece of tubing, one inch long and of a size to fit tightly on the shaft, close up against the cross-piece. Put the shaft through the bearing and stuffing-box tube, and put the cross-piece on the pins in the fly-wheel, and screw the bearing to the boat, so that it is close against the tube on the shaft. The screw has a screw-bolt like the fly-wheel to fix it to the shaft by. Drill a small hole in the shaft for it, and put the screw on the end of the shaft and fix it by tightening the screw.
The deck of the boat must be cut the shape of the inside of the gunwales, out of quarter-inch board, and is to be fixed so that the gunwales are one inch high. It must have a hole cut in the middle to go over the boiler and pipes. A hole must also be cut over the engine, and one also in the front part of the deck large enough to admit your hand, to allow of your removing and lighting the lamp. These two holes ought to be covered by movable skylights. A hole must be bored in the deck just in front of the after-skylight for the wire from the reversing-valve to project about half an inch. A wire handle must be fixed by riveting to the end of this, and two pegs driven into the deck, one on each side, in front, to prevent the handle being turned too far to either side. It should only turn one quarter of the way round.
If you have followed these directions your boat ought to steam for two hours and a half without refilling the boiler; though the lamp would not burn all that time. But if you solder a short piece of tube a quarter of an inch in diameter into the front end of the lamp and quite at the bottom edge of it, and have a closed tin tank with a like tube to it in the front part of the boat, and this tank is filled with spirits, and connected to the lamp by a piece of india-rubber tubing joining the two tubes, the lamp will supply itself from the tank as it gets low. The spirit from the tank will not fill the lamp, but will just cover the hole of the tube and keep at that height so long as there is any spirit in the tank. Such an engine as here described would cost to purchase about £7 10_s._, and the boat with engine complete, quite double that sum.