[9]He was born in 1472, at Thorn, in Prussia Royal: he died in 1543.[10]Several of the ancients were of opinion that we should admit the motion of the earth. Astron. Art. 1075.
[9]He was born in 1472, at Thorn, in Prussia Royal: he died in 1543.
[10]Several of the ancients were of opinion that we should admit the motion of the earth. Astron. Art. 1075.
I understand you, said she, and I love the moon for remaining attached to us when we were forsaken by all the other planets. Confess that if your German could have alienated that too, he would have done it without regret; for one may see, in every part of his hypothesis, that he was but little inclined to favour the earth. He did well, I replied, to humble the vanity of men who chuse to claim the best situation in the universe; 'tis with pleasure I consider the world mixing in the crowd of planets. Pshaw! cried the Marchioness; do you think vanity can haveany thing to do with a system of astronomy? Do you suppose I feel humbler for knowing that the earth goes round the sun? I assure you I esteem myself just as highly as I did before. Certainly, madam, I answered, men would be less concerned about the rank they held in the universe than that they enjoyed amongst their associates; neither would the disputes of two planets, for precedence, be so important in their judgement as those of two ambassadors. Nevertheless, the same disposition which induces a man of the world to aspire after the most honourable place in a room, will make a philosopher desirous of placing the globe on which he lives in the most distinguished situation in the universe. He likes to consider every thing made for his use; he encourages, without being aware of his vanity, so flattering an opinion, and his heart becomes deeply engaged about an affair of mere speculation. Upon my word, she exclaimed, you are calumniating human nature—how happened it that the opinions of Copernicus were received, since they are so very humiliating? Copernicus, answered I, was himself very doubtful of the reception they would meet with: it was a long while before he could resolve to publish his system; at last, however, he yielded to the entreaty of several distinguished characters; but what do you think was the consequence?—on the day they took him the first printed copy of his book, hedied: so he made use of the shortest way to escape from all the contradictions he had been anticipating.
Listen to me, said the Marchioness: let us be just to every body: it certainly is difficult to imagine we turn round the sun, for we never change places; we rise in the morning where we went to rest at night——I see from your look that you are going to tell me, that as the earth moves altogether——. Assuredly, said I, it is the same thing as going to sleep in a boat which was sailing down a river; on waking, you would find yourself in the same boat, and in the same part of the boat. Yes, replied she, but here is a difference; when I awoke I should find an alteration in the shore, and that would prove that the boat had changed its place: it is not so with respect to the earth, I there find every thing as I left it. No, no, madam, you may observe an alteration in the shore, as you do in the boat: you will recollect that beyond all the planets are the fixed stars, these are what we must consider the objects on the shore. I am on the earth; the earth describes a large circle round the sun; when I look to the middle of this circle I find the sun, and were not its brightness so dazzling as to render the stars invisible, I should constantly see, by looking beyond the centre, some of the fixed stars opposite to the sun; by viewing them however at night, I can easily determine howthey were situated in the day, which renders my observations equally accurate. If the earth remained in the same place I should always find the same fixed stars answering to the situation of the sun, but as the earth moves on in her orbit, I necessarily see other fixed stars at the point which I had before examined. Such is our shore, which is every day varying; and as the earth goes round the sun in a year, I observe the sun, during that space of time, successively answering to different fixed stars which compose a circle; this circle is called the Zodiac; shall I shew it you by tracing a figure on the earth? No, said she, I can dispense with that; it would give my park too learned an appearance. I think I have heard that a philosopher, shipwrecked on an island with which he was unacquainted, cried out to his companions on perceiving some lines and circles drawn on the sand;courage, my friends! the island is inhabited; here are the footsteps of men. You must consider that suchfootstepsought not to be seen here.
It would certainly, I replied be more in character, to trace only the footsteps of lovers; that is to say, your name, engraved by your adorers on the bark of every tree. No more of adorers, cried she; let us talk of the sun. I understand perfectly why we imagined it performing the revolution which is merely effected by our own motion, but this circle requires a year; how, then,does the sun appear to go round us every day? You undoubtedly know, I replied, that if a ball were rolled along this walk it would have two sorts of motion; it would go towards the end of the walk, and at the same time turn several times on its own axis, so that the side of the ball which is at first uppermost will presently descend, and the other, of course, rise to the top. This is the case with the earth: whilst she is proceeding, through the year, in her orbit round the sun, she turns on her own axis every twenty-four hours: each part, therefore, of the earth loses, and recovers sight of the sun during that time. When in the morning we turn towards the sun, it seems to rise; and when, by continued rotation, we again are more distant from it, it appears to descend. That's curious enough, said she; the earth undertakes every thing, and the sun does nothing at all: and when the moon, the other planets, and the fixed stars appear to pass over us in four-and-twenty hours, it is merely imagination. Exactly so, I replied, and produced by the same cause. The planets perform their revolutions round the sun in unequal periods of time, in consequence of their different distances from it; and one which we see to day answer to a certain point in the zodiac, or circle of fixed stars, will to-morrow at the same hour answer to some other point: this is the effect both of the progress which the planet has made in its orbit and of that which we have madein ours. We move onward; the other planets do the same, but we do not continue all in a line: this occasions us to see them in such different situations, and renders their course apparently irregular. You now understand that such irregularity depends only on the different points from which we view them, and that, in reality all their movements are directed by the most exact order. It may be so, answered the Marchioness; but I should be glad if their order did not cost the earth so much: you seem to have very little consideration for it, and to require an astonishing agility in so large a body. But, said I, do you think it more reasonable for the sun, and all the other heavenly bodies, which are extremely large, to perform in four-and-twenty hours an immense journey round the earth? That the fixed stars, being in the largest circle, should travel, in the course of a day, more than twenty-seven thousand six hundred and sixty times two hundred millions of leagues?[11]All this must be if the earth does not turn on her axis every twenty-four hours. Surely there is much more rationality in supposing our globe to turn, which would give to each part but a journey of nine thousandleagues. Consider what a trifle are nine thousand in comparison of the terrific number I have just mentioned.
[11]According to later calculations, it would be a thousand millions of times a million of leagues; but a person who did not believe the motion of the earth would have no occasion to admit this prodigious distance.
[11]According to later calculations, it would be a thousand millions of times a million of leagues; but a person who did not believe the motion of the earth would have no occasion to admit this prodigious distance.
Oh! replied the Marchioness; the sun and stars are made of fire, a swift motion is nothing to them, but the earth does not seem formed for motion. And should you think, I answered, if experience had not proved the fact, that a large ship, carrying a hundred and fifty pieces of cannon, three thousand men, and a heavy freight of merchandize, could beformed for motion?—Yet a gentle breeze is sufficient to move it forwards, because the water, being liquid, and easily divided, makes a very slight resistance to the progress of the ship, or if it be in the middle of a river, it follows without difficulty the current of the water, since there is then no impediment. In like manner the earth, notwithstanding its weight, is with facility carried through the sky which is infinitely more fluid than water, and which fills the immense space occupied by all the planets. To what could the earth be fastened so strongly as to resist the current of this celestial fluid and remain motionless? We might as well imagine a little wooden ball could resist the tide of a river.
But, said she, how can a body so ponderous as the earth be suspended in your celestial fluid, which from its great fluidity must be extremelylight? It does not follow, I replied, that a substance must be extremely light because it is fluid. What do you think of the great ship we have been talking of, which, with all its lading, is lighter than the water that supports it? I won't have any more to say to you, answered she, half angrily, if you mention your ship again.[12]But tell me, is it not dangerous to inhabit such a whirli-gig as you represent the earth? If you are afraid, said I, let us have the world supported by four elephants, as the Indians do. Well! cried she, here is a new system. I like those people for providing such good foundations for the earth to rest on, whilst we Copernicans are imprudent enough to swim at random in this celestial fluid. I dare say if the Indians knew there was the least danger of the earth's being moved, they would double the number of elephants.
[12]The Marchioness was in the right not to listen to such an answer. It is absurd to pretend that the ætherial fluid, so light and rare, can be capable of bearing along those enormous masses, the planets.
[12]The Marchioness was in the right not to listen to such an answer. It is absurd to pretend that the ætherial fluid, so light and rare, can be capable of bearing along those enormous masses, the planets.
It would be worth while, I replied, laughing at the thought, we must not be sparing of elephants if they can enable us to sleep in peace; if you would find them serviceable to-night we'll put as many as you please, and then remove them one or two at a time as you findyour courage return. No, said she, I don't think there is any need for them, and to speak seriously, I feel courageous enough to let the world turn round. And I can venture to predict, answered I, that in a little while its turning will give you pleasure; will even inspire the most delightful ideas, I sometimes imagine myself raised above the surface of the earth, and remaining motionless whilst its daily rotation continues. All the different inhabitants pass in review; some fair, some copper-coloured, some black. Now I see heads covered with hats; then with turbans; some shaven, others with flowing hair. As the towns pass before me, I observe some have steeples, some long spires with crosses on them, others are ornamented with towers of porcelaine. Then I behold large countries with no other buildings than little huts: afterwards, immense seas; then frightful deserts; and in short, all the boundless variety which is to be found on the face of the earth.
Really, she replied, it would be worth while to devote four-and-twenty hours to such a sight. If I understand you, when we move, other countries with their inhabitants pass into the situation we are leaving, and so on, till in four-and-twenty hours we again arrive at the same place.
Copernicus himself, said I, could not have comprehended it more clearly. The first thatwould succeed us[13]would be the English: we should probably find them arguing on some political topic with less gaiety than we are discussing our philosophy. When we had dismissed them we should discover a vast sea,[14]on which perhaps would be some vessel, less at her ease than we. Then come the Iroquois, eating one of their prisoners of war, who does not even utter a groan though still alive when they begin to devour him.[15]After them the women of Jesso, who employ all their time in preparing victuals for their husbands, and painting their lips and eye-brows blue to appear handsome in the eyes of the most disgusting men in the world. Then the Tartars, very devoutly going on a pilgrimage to their high priest, who dwells in an obscure recess, enlightened only by lamps, the rays of which direct these votaries to the object of their adoration. Afterwards the beautiful Circassians who make no ceremony of granting all their favours to the first that solicits them, except what they believe the essential prerogative of their husbands. Then the inhabitants of Little Tartary, who go to steal women for the Turks and Persians. Last of allour countrymen, whom we should find entertaining each other with the vagaries of their imagination.
[13]To speak more properly they would be one hundred leagues northward.[14]The Atlantic.[15]We should next see the Pacific Ocean.
[13]To speak more properly they would be one hundred leagues northward.
[14]The Atlantic.
[15]We should next see the Pacific Ocean.
It is amusing enough, said the Marchioness, to fancy oneself in a situation to see all these things: but if I were taking the view I should wish for the power of hastening or retarding the earth's motion, according to the feelings with which each object inspired me: I assure you I should soon push on those that argued on politics, and the others that devoured their enemies; but there are some of the people you have been speaking of that would excite my curiosity; the handsome Circassians, for instance, whose customs are so peculiar. But a serious difficulty occurs to me respecting your system. If the earth turns, we every moment change our atmosphere, and respire that of a new climate. By no means, madam, I replied; the air which surrounds the earth rises only to a certain height, twenty leagues perhaps at farthest;[16]this atmosphere always turns with us. You have doubtless observed the sort of shell in which a silk-worm imprisons itself, and which it forms with such astonishing art. It is composed of silk closely woven, but covered with a light down. Thus it is with regard to the earth, it is a solid body coveredwith an atmosphere extending to a certain height, which adheres to, and moves with it, as the down does with the firmer substance beneath it. Above our atmosphere is the celestial matter, incomparably more pure, subtile and active than air.
[16]Even at two leagues it is no longer discernible.
[16]Even at two leagues it is no longer discernible.
You represent the earth in a very contemptible light, said the Marchioness. Nevertheless on this silk-worm's shell we find stupendous works, furious wars, and universal agitation. Yes, answered I, and while all this is going on, nature, who does not concern herself about such frivolous things, carries us all along, with an uninterrupted motion, and amuses herself with the little ball.
It appears very ridiculous, replied she, to give way to so much anxiety, whilst one is living on a thing that is perpetually turning; but unfortunately we are not assured that it does turn, for, to tell you the truth, all the precautions you take to convince me that we should not feel its motion are unsatisfactory. How could it avoid giving some indication by which we should be sensible of it?[17]The most common and natural motions, said I, are the least felt: this observation is true even in a moral sense: the motions of self-love are so frequent in our minds, that forthe most part we are not sensible of them, but believe ourselves actuated by other principles. Ah! you are beginning to moralize, said she; moralizing and explaining natural philosophy are a little different; I fancy you grow tired of your subject: let us return home, we have had enough for the first lecture. To-morrow we will come here again—you with your systems, and I with my ignorance.
[17]There are several; one of them is the aberration of the stars. Astron. Book xvii.
[17]There are several; one of them is the aberration of the stars. Astron. Book xvii.
In our way to the house, to give her a complete history of systems, I told her that a third had been invented by Ticho Brahe, who, from a determination to keep the earth in a state of rest, placed her in the centre of the universe, making the sun revolve round her, and the planets round the sun; for in consequence of some discoveries which had been lately made, he found it impossible to make the planets go round the earth. The Marchioness, with her usual discernment, concluded that it was mere whim to exempt the earth from moving round the sun, when so many other larger bodies were allowed to perform the revolution; that the sun was rendered more unfit for turning round the earth when incumbered with the other planets, and in short that this system was only calculated to support a prejudice in favour of the earth's immobility,[18]withoutoffering any thing to convince the judgment; we therefore resolved to retain that of Copernicus, which is more uniform and pleasing, and at the same time unmixed with prejudice. In fact its simplicity convinces, whilst its boldness excites admiration.
[18]The ridiculous system of Ticho was invented out of respect to the holy scriptures, not considering that their object was more important than the refutation of popular errors on natural philosophy.
[18]The ridiculous system of Ticho was invented out of respect to the holy scriptures, not considering that their object was more important than the refutation of popular errors on natural philosophy.