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A Letter to the Kensington Canal Company on the Substitution of the Pneumatic Railway for the Common Railway by Which They Contemplate Extending Their Line of Conveyance

Note 33 — A LETTER, &c. (continued 2)

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I give this latter doubling to “excite the energies” of a renowned steam-coach proprietor; who, in answer to the question, “If your steam-coach has, as you say, gone at the rate of between thirty and forty miles an hour over common roads, how fast would it run on a rail-road?” replied, “At least 250 miles an hour.”

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