Ten minutes' reading of plain observations upon canals and navigable rivers

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1848 - 80 páginas
 

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Página 35 - Sir, — Having laid before my Lords Commissioners of the Admiralty, your letter of the...
Página 18 - Brook ; there are two barrels fixed in the engine boat, which are made to revolve round their centrepieces by the power of the engine, and as they go round, they wind up one end of the rope and let out the other, so that when the barge is at either of the above-mentioned places one barrel is bare and the other filled with. the coil. The rope that is loosed falls, by its own gravity, to the bottom of the canal, so that there is no obstruction offered to other vessels. Thus when the boat has arrived...
Página 17 - A newly-constructed steam apparatus, by Christie and Co., of London, is now working upon the Duke of Bridgewater's Canal, between Runcorn and Preston Brook. It consists, first of all, of a simple barge, which carries the engine ; but, of course, has no paddles. It propels itself, with whatever burden is attached to it, by means of a rope, one end of which is made fast at Runcorn, and the other at Preston Brook ; there are two barrels fixed in the engine-boat, which are made to revolve round their...
Página 18 - Brook, about five and a half miles, in two hours. It seems fully to answer the expectations of the trustees, and it will enable them to clear the docks of the different carriage-barges at a wonderful rate of dispatch.— ¿iverpool Mercury.
Página 19 - ... to the centrifugal action of the water. The three problems, of the most effective method of supply, the delivery, and above all the best direction of the course of the water, appear to have been solved with great ingenuity by the patentee. The principle of the invention may, indeed, more briefly be stated to consist in the ejectment of a column of water in a parallel line with that of the vessel's motion, which column acts against the water outside the vessel. The patentee's theory is, that as...
Página 19 - ... bird flies onward, so these two submerged columns act as powerful water wings, beating back the denser mass of the water with invisible but irresistible force. Nothing, assuredly, can be more beautiful than the noiseless and mysterious motion of Mr. Simpson's boat. There is an entire absence of all surface swell, and the vessel steals rapidly through the water as if impelled by some magical or invisible agency.
Página 13 - ... been in. That the atoms are vesicular, I rather infer from their floating, and from the optical phenomena of clouds and mists, the rainbow, halo, and corona ; and from being enveloped in fog when the known amount of water present has been exceedingly small. For instance, it is generally understood that a cubic inch of water produces a cubic foot of steam. When at heights exceeding four miles, and when there was less than one 2000th part of a cubic inch of water in a cubic foot of air, a bulk...
Página 18 - ... bare, and the other filled with the coil. The rope that is loosed falls, by its own gravity, to the bottom of the canal, so that there is no obstruction offered to other vessels. Thus, when the boat has arrived at Preston Brook, the Runcorn barrel is uncoiled, and vice versa on its arrival at Runcorn. On Tuesday last, six loaded barges were attached to it, four of forty tons...

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