Though large countries within our Union are covered with the sugar maple, as heavily as can be conceived, and that this tree yields a sugar equal to the best from the cane, yields it in great quantity, with no other labor than what the women and girls can bestow, who attend to the drawing off and boiling the liquor, and the trees when skilfully tapped will last a great number of years, yet the ease with which we had formerly got cane sugar, had prevented our attending to this resource. Late difficulties in the sugar trade have excited attention to our sugar trees, and it seems fully believed by judicious persons, that we cannot only supply our own demand, but make for exportation. I will send you a sample of it, if I can find a conveyance without passing it through the expensive one of the post. What a blessing to substitute a sugar which requires only the labor of children, for that which is said to render the slavery of the blacks necessary.
An act of Congress authorizing the issuing of patents for new discoveries has given a spring to invention beyond my conception. Being an instrument in granting the patents, I am acquainted with their discoveries. Many of them indeed are trifling, but there are some of great consequence, which have been proved by practice, and others which, if they stand the same proof, will produce great effect. Yesterday the man who built the famous bridge from Boston to Charlestown, was with me, asking a patent for a pile engine of his own construction. He communicated to me another fact, of which he makes no secret, and it is important. He was formerly concerned in ship building, but for thirty years past has been a bridge builder. He had early in life observed, on examining worm-eaten ships, that the worms never eat within the seams where the corking chisel enters, and the oil, &c. He had observed that the whaling vessels would be eaten to a honey-comb, except a little above and below water, where the whale is brought in contact with the vessel, and lies beating against it till it is cut up. A plank lying under water at a mill of his had been obliged to be removed annually, because eaten up by the worms in the course of the year. At length a plank was accidentally put down which for some purpose had been thoroughly impregnated with oil. It remained seven years without being affected. Hence he took the idea of impregnating the timbers of his bridges thoroughly with oil, by heating the timber as deeply as possible, and doing it well in that state with the liver oil of the codfish. He has practiced this for thirty years, and there is no instance of the worm attacking his timbers, while those in neighboring places are immediately destroyed. He has used the liver oil of the cod, because very thick, and therefore, as he supposes, more permanent in its effect. He supposes some other oils might do, but cannot speak of them experimentally. He says there will be no difficulty in heating the planks of a ship after they are put on, as well as before; but I do not recollect his mentioning ever to have tried it in the case of a ship.
I am fixed here by the desire of my countrymen; consequently less in the way of communications in letters and the arts than I used to be. The continuance of your communications in that way will now be received with double thankfulness.
We are told you are going to war. Peace and profit will, I hope, be our lot. A high price and sure market for our productions, and no want of carrying business will, I hope, enable my countrymen to pay off both their private and public debts.
I am, with sentiments of sincere esteem, dear Sir, your sincere friend and servant.
TO DR. GILMER.
New York, June 27, 1790.
Dear Doctor,—I have duly received your favor of May 21st, and thank you for the details it contains. Congressional proceedings go on rather heavily. The question for assuming the State debts, has created greater animosities than I ever yet saw take place on any occasion. There are three ways in which it may yet terminate. 1. A rejection of the measure, which will prevent their funding any part of the public debt, and will be something very like a dissolution of the government. 2. A bargain between the eastern members, who have it so much at heart, and the middle members, who are indifferent about it, to adopt those debts without any modification, on condition of removing the seat of government to Philadelphia or Baltimore. 3. An adoption of them with this modification, that the whole sum to be assumed shall be divided among the States in proportion to their census; so that each shall receive as much as they are to pay; and perhaps this might bring about so much good humor as to induce them to give the temporary seat of government to Philadelphia, and then to Georgetown permanently. It is evident that this last is the least bad of all the turns the thing can take. The only objection to it will be, that Congress will then have to lay and collect taxes to pay these debts, which could much better have been laid and collected by the State governments. This, though an evil, is a less one than any of the others in which it may issue, and will probably give us the seat of Government at a day not very distant, which will vivify our agriculture and commerce by circulating through our State an additional sum every year of half a million of dollars. When the last packet left England, there was great appearance of an immediate rupture with Spain. Should that take place, France will become a party. I hope peace and profit will be our share. Present my best respects to Mrs. Gilmer, and my enquiring neighbors.
I am, dear Doctor, your affectionate friend and servant.