than a semi-circle, and never more. He says he has seen it more than a semi-circle. I have often seen the leg of the bow below my level. My situation at Monticello admits this, because there is a mountain there in the opposite direction of the afternoon's sun, the valley between which and Monticello, is five hundred feet deep. I have seen a leg of a rainbow plunge down on the river running through the valley. But I do not recollect to have remarked at any time, that the bow was more than half a circle. It appears to me, that these facts demolish the Newtonian hypothesis, but they do not support that erected in its stead by the Abbé. He supposes a cloud between the sun and the observer, and that through some opening in that cloud, the rays pass, and form an iris on the opposite part of the heavens, just as a ray passing through a hole in the shutter of a darkened room, and falling on a prism there, forms the prismatic colors on the opposite wall. According to this, we might see bows of more than the half circle, as often as of less. A thousand other objections occur to this hypothesis, which need not be suggested to you. The result is, that we are wiser than we were, by having an error the less in our catalogue; but the blank occasioned by it, must remain for some happier hypothesist to fill up.

The dispute about the conversion and re-conversion of water and air, is still stoutly kept up. The contradictory experiments of chemists, leave us at liberty to conclude what we please. My conclusion is, that art has not yet invented sufficient aids, to enable such subtle bodies to make a well-defined impression on organs as blunt as ours; that it is laudable to encourage investigation, but to hold back conclusion. Speaking one day with Monsieur de Buffon, on the present ardor of chemical inquiry, he affected to consider chemistry but as cookery, and to place the toils of the laboratory on a footing with those of the kitchen. I think it, on the contrary, among the most useful of sciences, and big with future discoveries for the utility and safety of the human race. It is yet, indeed, a mere embryon. Its principles are contested; experiments seem contradictory; their subjects are so minute as to escape our senses; and their result too fal

lacious to satisfy the mind. It is probably an age too soon, to propose the establishment of a system. The attempt, therefore, of Lavoisier to reform the chemical nomenclature, is premature. One single experiment may destroy the whole filiation of his terms, and his string of sulphates, sulphites, and sulphures, may have served no other end, than to have retarded the progress of the science, by a jargon, from the confusion of which, time will be requisite to extricate us. Accordingly, it is not likely to be admitted generally.

You are acquainted with the properties of the composition of nitre, salt of tartar and sulphur, called pulvis fulminans. Of this, the explosion is produced by heat alone. Monsieur Berthclet, by dissolving silver in the nitrous acid, precipitating it with lime water, and drying the precipitate on ammoniac, has discovered a powder which fulminates most powerfully, on coming into contact with any substance however. Once made, it cannot be touched. It cannot be put into a bottle, but must remain in the capsule, where dried. The property of the spathic acid, to corrode flinty substances, has been lately applied by a Mr. Puymaurin, to engrave on glass, as artists engrave on copper, with aquafortis. M. de La Place has discovered, that the secular acceleration and retardation of the moon's motion, is cccasioned by the action of the sun, in proportion as his eccentricity changes, or, in cther words, as the orbit of the earth increases or diminishes. So that this irregularity is now perfectly calculable.

Having seen announced in a gazette, that some person had found in a library of Sicily, an Arabic translation of Livy, which was thought to be complete, I got the chargé des affaires of Naples here, to write to Naples to inquire into the fact. He obtained in answer, that an Arabic translation was found, and that it would restore to us seventeen of the books lost, to wit, from the sixtieth to the seventy-seventh, inclusive: that it was in pcssession of an Abbé Vella, who, as soon as he shall have finished a work he has on hand, will give us an Italian, and perhaps a Latin translation of this Livy. There are persons, however,

who doubt the truth of this discovery, founding their doubts on some personal circumstances relating to the person who says he has this translation. I find, nevertheless, that the chargé des affaires believes in the discovery, which makes me hope it may be true.

A countryman of ours, a Mr. Ledyard of Connecticut, set out from hence some time ago for St. Petersburg, to go thence to Kamtschatka, thence to cross over to the western coast of America, and penetrate through the continent, to the other side of it. He had got within a few days' journey of Kamtschatka, when he was arrested by order of the Empress of Russia, sent back, and turned adrift in Poland. He went to London; engaged under the auspices of a private society, formed there for pushing discoveries into Africa; passed by this place, which he left a few days ago for Marseilles, where he will embark for Alexandria and Grand Cairo; thence explore the Nile to its source; cross the head of the Niger, and descend that to its mouth. He promises me, if he escapes through his journey, he will go to Kentucky, and endeavor to penetrate westwardly to the South Sea.

The death of M. de Buffon you have heard long ago. I do not know whether we shall have anything posthumous of his. As to political news, this country is making its way to a good constitution. The only danger is, they may press so fast as to produce an appeal to arms, which might have an unfavorable issue for them. As yet, the appeal is not made. Perhaps the war which seems to be spreading from nation to nation, may reach them; this would ensure the calling of the States General, and this, as is supposed, the establishment of a constitution.

I have the honor to be, with sentiments of sincere esteem and respect, dear Sir, your friend and servant.

TO E. RUTLEDGE.

PARIS, July 18, 1788.

DEAR SIR,-Messrs. Berard were to have given me particular accounts of the proceeds of the shipments of rice made to them.

But they have failed. I fear, from what they mention, that the price has been less advantageous than usual; which is unlucky, as it falls on the first essay. If on the whole, however, you get as much as you would have done by a sale on the spot, it should encourage other adventures, because the price at Havre or Rouen is commonly higher, and because I think you may, by trials, find out the way to avail yourselves of the Paris retail price. The Carolina rice sold at Paris, is separated into three kinds 1, the whole grains; 2, the broken grains; 3, the small stuff; and sell at ten, eight, and six livres the French pound, retail. The whole grains, which constitute the first quality, are picked out by hand. I would not recommend this operation to be done with you, because labor is dearer there than here. But I mention these prices, to show, that after making a reasonable deduction for sorting, and leaving a reasonable profit to the retailer, there should still remain a great wholesale price. I shall wish to know from you, how much your cargo of rice shipped to Berard netts you, and how much it would have netted in hard money, if you had sold it at home.

You promise, in your letter of October the 23d, 1787, to give me in your next, at large, the conjectures of your philosopher on the descent of the Creek Indians from the Carthaginians, supposed to have been separated from Hanno's fleet, during his periplus. I shall be very glad to receive them, and see nothing impossible in his conjecture. I am glad he means to appeal to similarity of language, which I consider as the strongest kind of proof it is possible to adduce. I have somewhere read, that the language of the ancient Carthaginians is still spoken by their descendants, inhabiting the mountainous interior parts of Barbary, to which they were obliged to retire by the conquering Arabs. If so, a vocabulary of their tongue can still be got, and if your friend will get one of the Creek languages, the comparison will decide. He probably may have made progress in this business; but if he wishes any enquiries to be made on this side the Atlantic, I offer him my services cheerfully; my wish being like his, to ascertain the history of the American aborigines.

I congratulate you on the accession of your State to the new federal constitution. This is the last I have yet heard of, but I expect daily to hear that my own has followed the good example, and suppose it to be already established. Our government wanted bracing. Still, we must take care not to run from one extreme to another; not to brace too high. I own, I join those in opinion, who think a bill of rights necessary. I apprehend too, that the total abandonment of the principle of rotation in the offices of President and Senator, will end in abuse. But my confidence is, that there will, for a long time, be virtue and good sense enough in our countrymen, to correct abuses. We can surely boast of having set the world a beautiful example of a government reformed by reason alone, without bloodshed. But the world is too far oppressed, to profit by the example. On this side of the Atlantic, the blood of the people is become an inheritance, and those who fatten on it, will not relinquish it easily. The struggle in this country is, as yet, of doubtful issue. It is, in fact, between the monarchy and the parliaments. The nation is no otherwise concerned, but as both parties may be induced to let go some of its abuses, to court the public favor. The danger is, that the people, deceived by a false cry of liberty, may be led to take side with one party, and thus give the other a pretext for crushing them still more. If they can avoid the appeal to arms, the nation will be sure to gain much by this controversy. But if that appeal is made, it will depend entirely on the disposition of the army, whether it issue in liberty or despotism. Those dispositions are not as yet known. In the meantime, there is great probability that the war kindled in the east, will spread from nation to nation, and in the long run, become general. *

I am, with the most sincere esteem and attachment, my dear Sir, your friend and servant.