How deeply have I been chagrined and mortified at the persecutions which fanaticism and monarchy have excited against you, even here! At first, I believed it was merely a continuance of the English persecution; but I observe that, on the demise of Porcupine, and the division of his inheritance between Fenno and Brown, the latter (though succeeding only to the Federal portion of Porcupinism, not the Anglican, which is Fenno's part) serves up for the palate of his sect dishes of abuse against you as high-seasoned as Porcupine's were. You have sinned against Church and King, and therefore can never be forgiven. How sincerely I have regretted that your friend, before he fixed a choice of position, did not visit the valleys on each side of the blue range in Virginia, as Mr. Madison and myself so much wished. You would have found there equal soil, the finest climate, and the most healthy air on the earth, the homage of universal reverence and love, and the power of the country spread over you as a shield; but, since you would not make it your Country by adoption, you must now do it by your good offices. Mr. Livingston, the Chancellor of New York, so approved the "Letters" that he got a new edition of them printed at Albany. The following letter to this same gentleman, although upon another subject than the "Letters" is not devoid of interest. It has come into the writer's hands through the kind offices of Dr. Thomas L. Montgomery, State Librarian of Pennsylvania: Sir, I think myself much honoured by your letter, and should have thought myself singularly happy if my situation had been near to such a person as you. Persons engaged in scientific pursuits are few in this country. Indeed, they are not very numerous anywhere. In other respects I think myself very happy where I am. I have never given much attention to machines of any kind, and therefore cannot pretend to decide concerning your proposal for the improvement of the fire engine. It appears to me to deserve attention. But I do not for want of a drawing see in what manner the steam is to be let into the cylinder, or discharged from it. There would be, I fear, an objection to it from the force necessary to raise the column of mercury, and from the evaporation of the mercury in the requisite heat. I have found that it loses weight in 70 deg. Fahrenheit. If the mercury was pure, I should not apprehend much from the calcination of it, though, as I have observed, the agitation of it in water, converts a part of it into a black powder, which I propose to examine farther.