TO MELATIAH NASH.

MONTICELLO, November 15, 1811. SIR,-I duly received your letter of October 24 on the publication of an Ephemeris. I have long thought it desirable that something of that kind should be published in the United States, holding a middle station between the nautical and the common popular almanacs. It would certainly be acceptable to a numerous and respectable description of our fellow citizens, who, without undertaking the higher astronomical operations, for which the former is calculated, yet occasionally wish for information beyond the scope of the common almanacs. What you propose to insert in your Ephemeris is very well so far. But I think you might give it more of the character desired by the addition of some other articles, which would not enlarge it more than a leaf or two. For instance, the equation of time is essential to the regulation of our clocks and watches, and would only add a narrow column to your 2d page. The sun's declination is often desirable, and would add but another narrow column to the same page. This last would be the more useful as an element for obtaining the rising and setting of the sun, in every part of the United States; for your Ephemeris will, I suppose, give it only for a particular parallel, as of New York, which would in a great measure restrain its circulation to that parallel. But the sun's declination would enable every one to calculate sunrise for himself, with scarcely more trouble than taking it from an Almanac. If you would add at the end of the work a formula for that calculation, as, for example, that for Delalande, § 1026, a little altered. Thus, to the Logarithmic tangent of the latitude (a constant number) add the Log. tangent of the sun's declination; taking 10 from the Index, the remainder is the line of an arch which, turned into time and added to 6 hours, gives sunrise for the winter half and sunset for the summer half of the year, to which may be added 3 lines only from the table of refractions, § 1028, or, to save even this trouble, and give the calculation ready made for every parallel, print a table of semi-diurnal

arches, ranging the latitudes from 35° to 45° in a line at top, and the degrees of declination in a vertical line on the left, and stating, in the line of the declination, the semi-diurnal arch for each degree of latitude, so that every one knowing the latitude of his place and the declination of the day, would find his sunrise or his sunset where their horizontal and vertical lines meet. This table is to be found in many astronomical books, as, for instance, in Wakeley's Mariner's Compass Rectified, and more accurately in the Connoissance des tems, for 1788. It would not occupy more than two pages at the end of the work, and would render it an almanac for every part of the United States.

To give novelty, and increase the appetite for continuing to buy your Ephemeris annually, you might every year select some one or two useful tables which many would wish to possess and preserve. These are to be found in the requisite tables, the Connoissance des tems for different years, and many in Pike's arithmetic.

I have given these hints because you requested my opinion. They may extend the plan of your Ephemeris beyond your view, which will be sufficient reason for not regarding them. In any event I shall willingly become a subscriber to it, if you should have any place of deposit for them in Virginia where the price can be paid. Accept the tender of my respects.

TO DOCTOR BENJAMIN RUSH.

POPLAR FOREST, December 5, 1811.

DEAR SIR,-While at Monticello I am so much engrossed by business or society, that I can only write on matters of strong urgency. Here I have leisure, as I have everywhere the disposition to think of my friends. I recur, therefore, to the subject of your kind letters relating to Mr. Adams and myself, which a late occurrence has again presented to me. I communicated to you the correspondence which had parted Mrs. Adams and myself, in proof that I could not give friendship in exchange for such sen

timents as she had recently taken up towards myself, and avowed and maintained in her letters to me. Nothing but a total renunciation of these could admit a reconciliation, and that could be cordial only in proportion as the return to ancient opinions was believed sincere. In these jaundiced sentiments of hers I had associated Mr. Adams, knowing the weight which her opinions had with him, and notwithstanding she declared in her letters that they were not communicated to him. A late incident has satisfied me that I wronged him as well as her, in not yielding entire confidence to this assurance on her part. Two of the Mr.****, my neighbors and friends, took a tour to the northward during the last summer. In Boston they fell into company with Mr. Adams, and by his invitation passed a day with him at BrainHe spoke out to them everything which came uppermost, and as it occurred to his mind, without any reserve; and seemed most disposed to dwell on those things which happened during his own administration. He spoke of his masters, as he called his Heads of departments, as acting above his control, and often against his opinions. Among many other topics, he adverted to the unprincipled licentiousness of the press against myself, adding, "I always loved Jefferson, and still love him."

tree.

This is enough for me. I only needed this knowledge to revive towards him all the affections of the most cordial moments of our lives. Changing a single word only in Dr. Franklin's character of him, I knew him to be always an honest man, often a great one, but sometimes incorrect and precipitate in his judgments; and it is known to those who have ever heard me speak of Mr. Adams, that I have ever done him justice myself, and defended him when assailed by others, with the single exception as to political opinions. But with a man possessing so many other estimable qualities, why should we be dissocialized by mere differences of opinion in politics, in religion, in philosophy, or anything else. His opinions are as honestly formed as my own. different views of the same subject are the result of a difference in our organization and experience. I never withdrew from the society of any man on this account, although many have done it

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from me; much less should I do it from one with whom I had gone through, with hand and heart, so many trying scenes. I wish, therefore, but for an apposite occasion to express to Mr. Adams my unchanged affections for him. There is an awkwardness which hangs over the resuming a correspondence so long discontinued, unless something could arise which should call for a letter. Time and chance may perhaps generate such an occasion, of which I shall not be wanting in promptitude to avail myself. From this fusion of mutual affections, Mrs. Adams is of course separated. It will only be necessary that I never name her. In your letters to Mr. Adams, you can, perhaps, suggest my continued cordiality towards him, and knowing this, should an occasion of writing first present itself to him, he will perhaps avail himself of it, as I certainly will, should it first occur to me. No ground for jealousy now existing, he will certainly give fair play to the natural warmth of his heart. Perhaps I may open the way in some letter to my old friend Gerry, who I know is in habits of the greatest intimacy with him.

I have thus, my friend, laid open my heart to you, because you were so kind as to take an interest in healing again revolutionary affections, which have ceased in expression only, but not in their existence. God ever bless you, and preserve you in life and health.

TO DOCTOR CRAWFORD.

MONTICELLO, January 2, 1812.

SIR,-Your favor of December 17th, has been duly received, and with it the pamphlet on the cause, seat and cure of diseases, for which be pleased to accept my thanks. The commencement which you propose by the natural history of the diseases of the human body, is a very interesting one, and will certainly be the best foundation for whatever relates to their cure. While surgery is seated in the temple of the exact sciences, medicine has scarcely entered its threshold. Her theories have passed in such

rapid succession as to prove the insufficiency of all, and their fatal errors are recorded in the necrology of man. For some forms of disease, well known and well defined, she has found substances which will restore order to the human system, and it is to be hoped that observation and experience will add to their number. But a great mass of diseases remain undistinguished and unknown, exposed to the random shot of the theory of the day. If on this chaos you can throw such a beam of light as your celebrated brother has done on the sources of animal heat, you will, like him, render great service to mankind.

The fate of England, I think with you, is nearly decided, and the present form of her existence is drawing to a close. The ground, the houses, the men will remain; but in what new form they will revive and stand among nations, is beyond the reach of human foresight. We hope it may be one of which the predatory principle may not be the essential characteristic. If her transformation shall replace her under the laws of moral order, it is for the general interest that she should still be a sensible and independent weight in the scale of nations, and be able to contribute, when a favorable moment presents itself, to reduce under the same order, her great rival in flagitiousness. We especially ought to pray that the powers of Europe may be so poised and counterpoised among themselves, that their own safety may require the presence of all their force at home, leaving the other quarters of the globe in undisturbed tranquillity. When our strength will permit us to give the law of our hemisphere, it should be that the meridian of the mid-Atlantic should be the line of demarkation between war and peace, on this side of which no act of hostility should be committed, and the lion and the lamb lie down in peace together.

I am particularly thankful for the kind expressions of your letter towards myself, and tender you in return my best wishes and the assurances of my great respect and esteem.