A CANAL BOAT PROPELLED BY AIR.


A novelty in canal boats lies in Charles River, near the foot of
Chestnut street, which is calculated to attract considerable
attention. It is called a pneumatic canal boat and was built at
Wiscasset, Me., as devised by the owner, Mr. R.H. Tucker, of Boston,
who claims to hold patents for its design in England and the United
States. The specimen shown on Charles River, which is designed to be
used on canals without injuring the banks, is a simple structure,
measuring sixty-two feet long and twenty wide. It is three feet in
depth and draws seventeen inches of water. It is driven entirely by
air, Root's blower No. 4 being used, the latter operated by an
eight-horse-power engine. The air is forced down a central shaft to
the bottom, where it is deflected, and, being confined between keels,
passes backward and upward, escaping at the stern through an orifice
nineteen feet wide, so as to form a sort of air wedge between the boat
and the surface of the water. The force with which the air strikes the
water is what propels it. The boat has a speed of four miles an hour,
but requires a thirty-five-horsepower engine to develop its full
capabilities. The patentee claims a great advantage in doing away with
the heavy machinery of screws and side-wheels, and believes that the
contrivance gives full results, in proportion to the power employed.
It is also contrived for backing and steering by air propulsion.
Owing to the slight disturbance which it causes to the water, it is
thought to be very well adapted for work on canals without injury to
the sides.--_Boston Journal._

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