Great Fortunes, and How They Were MadeMcCabe, James Dabney
History
Great Fortunes, and How They Were Made
McCabe, James Dabney
United States -- Biography
In 1737, Jonathan Hulls issued a pamphlet proposing to construct a boat
to be moved by steam power, for the purpose of towing vessels out of
harbors against tide and winds. In his plan the paddle-wheel was used,
and was secured to a frame placed far out over the stern of the boat. It
was given this position by the inventor because water fowls propelled
themselves by pushing their feet behind them.
In 1787, Mr. James Rumsey, of Shepherdstown, Virginia, constructed and
navigated the first steamboat in actual use. His boat was eighty feet in
length, and was propelled by means of a vertical pump in the middle of
the vessel, by which the water was drawn in at the bow and expelled at
the stern through a horizontal trough in her hull. The engine weighed
about one third of a ton, and the boat had a capacity of about three
tons burthen. When thus laden, a speed of about four miles an hour could
be attained. The boiler held only five gallons of water, and needed but
a pint at a time. Rumsey went to England to exhibit his plan on the
Thames, and died there in 1793.
About the same time the Marquis de Joffrey launched a steamer one
hundred feet long on the Loire, at Lyons, using paddles revolving on an
endless chain, but only to find his experiment a failure.
In December, 1786, John Fitch published the following account of a
steamer with which he had made several experiments on the Delaware, at
Philadelphia, and which came nearer to success than any thing that had
at that time been invented:
"The cylinder is to be horizontal, and the steam to work with equal
force at each end. The mode by which we obtain what I term a vacuum is,
it is believed, entirely new, as is also the method of letting the water
into it, and throwing it off against the atmosphere without any
friction. It is expected that the cylinder, which is of twelve inches
diameter, will move a clear force of eleven or twelve cwt. after the
frictions are deducted: this force is to be directed against a wheel of
eighteen inches diameter. The piston moves about three feet, and each
vibration of it gives the axis about forty revolutions. Each revolution
of the axis moves twelve oars or paddles five and a half feet: they work
perpendicularly, and are represented by the strokes of a paddle of a
canoe. As six of the paddles are raised from the water, six more are
entered, and the two sets of paddles make their strokes of about eleven
feet in each revolution. The crank of the axis acts upon the paddles
about one-third of their length from their lower ends, on which part of
the oar the whole force of the axis is applied. The engine is placed in
the bottom of the boat, about one-third from the stern, and both the
action and reaction turn the wheel the same way."
Fitch was unfortunate in his affairs, and became so disheartened that
he ceased to attempt to improve his invention, and finally committed
suicide by drowning himself in the Alleghany River at Pittsburgh.
Public-domain text, read in full here on John Shaqi.
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