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M is a Siemens electric motor running at 650 revolutions per minute; E is a combination of box gearing, frictional clutch, and chain pinion, and from this pinion a steel chain passes around the chain-wheel, H, which is free to revolve upon the axle, and carries within it the differential pinion, gearing with the bevel-wheel, B², keyed upon the sleeve of the loose tram-wheel, T², and with the bevel-wheel, B¹, keyed upon the axle, to which the other tram-wheel, T¹, is attached.
From this vessel pipes lead to two cocks, one for each cylinder; these corks being caused to revolve in time with the engine-shaft by a chain, M, communicating motion from a wheel on the engine shaft to a chain-wheel of equal size on the spindle of the two cocks.
Then perhaps the bell would jam or a brake fail to act on a hill; or the seat-pillar would get loose, and the saddle drop three or four inches with a disconcerting bump; or the loose and rattling chain would jump the cogs of the chain-wheel as the machine ran downhill, and so bring the mechanism to an abrupt and disastrous stop without at the same time arresting the forward momentum of the rider; or a tyre would bang, or sigh quietly, and give up the struggle for efficiency.
A shaft extending directly under the float, and reaching from the center to the axle supporting the propellers, and connected therewith by means of side cog-wheels, might be used; and as the shaft would necessarily diverge from a straight line with the said axle, the shaft having the chain-wheel on the end directly over the engine and connected therewith in the manner proposed by Mr.
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