French-British engineer (1769-1849) who constructed the Thames Tunnel. ALS signed “Is. Brunel,” one page both sides, 7.5 x 9, January 14, 1799. Handwritten letter to Chancellor of New York Robert R. Livingston, offering his engineering services. In part: "Expecting to said of London by the 25th, at latest, of this month, I offer you the services it might be in my power to render you on the subject of your late improvements on hydroliques and steam machine. Your late improvements particularly upon the steam engine without friction is in my opinion of very great importance and reflect much honor upon the inventor. I flatter myself that undertaking perfectly your principle, I am able to bring your invention to an early practice by making a model of about 150th power upon which I will be able to make all the experiments requisite to ascertain the practicability of this valuable discovery." In fine condition.
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