Letter to Pythocles

Hicks: "Epicurus to Pythocles, greeting. "In your letter to me, of which Cleon was the bearer, you continue to show me affection which I have merited by my devotion to you, and you try, not without success, to recall the considerations which make for a happy life. To aid your memory you ask me for a clear and concise statement respecting celestial phenomena; for what we have written on this subject elsewhere is, you tell me, hard to remember, although you have my books constantly with you. I was glad to receive your request and am full of pleasant expectations.

Yonge: “Cleon has brought me your letter, in which you continue to evince towards me an affection worthy of the friendship which I have for you. You devote all your care, you tell me, to engraving in your memory those ideas which contribute to the happiness of life; and you entreat me at the same time to send you a simple abridgment and abstract of my ideas on the heavenly phænomena, in order that you may without difficulty preserve the recollection of them. For, say you, what I have written on this subject in my other works is difficult to recollect, even with continual study.

EpicureanFriends: Same as the Bailey text above.

Hicks: We will then complete our writing and grant all you ask. Many others besides you will find these reasonings useful, and especially those who have but recently made acquaintance with the true story of nature and those who are attached to pursuits which go deeper than any part of ordinary education. So you will do well to take and learn them and get them up quickly along with the short epitome in my letter to Herodotus.

Yonge: “I willingly yield to your desire, and I have good hope, that in fulfilling what you ask, I shall be useful too to many others, especially to those who are as yet novices in the real knowledge of nature, and to those to whom the perplexities and the ordinary affairs of life leave but little leisure. Be careful then to seize on those precepts thoroughly, engrave them deeply in your memory, and meditate on them with the abridgment addressed to Herodotus, which I also send you.

EpicureanFriends: Same as the Bailey text above.

Hicks: "In the first place, remember that, like everything else, knowledge of celestial phenomena, whether taken along with other things or in isolation, has no other end in view than peace of mind and firm conviction. We do not seek to wrest by force what is impossible, nor to understand all matters equally well, nor make our treatment always as clear as when we discuss human life or explain the principles of physics in general – for instance, that the whole of being consists of bodies and intangible nature, or that the ultimate elements of things are indivisible, or any other proposition which admits only one explanation of the phenomena to be possible. But this is not the case with celestial phenomena: these at any rate admit of manifold causes for their occurrence and manifold accounts, none of them contradictory of sensation, of their nature.

Yonge: “Know then, that it is with the knowledge of the heavenly phænomena, both with those which are spoken of in contact with one another, and of those which have a spontaneous existence, as with every other science; it has no other aim but that freedom from anxiety, and that calmness which is derived from a firm belief. “It is not good to desire what is impossible, and to endeavour to enunciate a uniform theory about everything; accordingly, we ought not here to adopt the method, which we have followed in our researches into Ethics, or in the solution of problems of natural philosophy. We there said, for instance, that there are no other things, except bodies and the vacuum, that the atoms are the principles of things, and so of the rest. In a word, we gave a precise and simple explanation of every fact, conformable to appearances.

EpicureanFriends: Same as the Bailey text above.

Hicks: "For in the study of nature we must not conform to empty assumptions and arbitrary laws, but follow the promptings of the facts; for our life has no need now of unreason and false opinion; our one need is untroubled existence. All things go on uninterruptedly, if all be explained by the method of plurality of causes in conformity with the facts, so soon as we duly understand what may be plausibly alleged respecting them. But when we pick and choose among them, rejecting one equally consistent with the phenomena, we clearly fall away from the study of nature altogether and tumble into myth. Some phenomena within our experience afford evidence by which we may interpret what goes on in the heavens. We see how the former really take place, but not how the celestial phenomena take place, for their occurrence may possibly be due to a variety of causes.

Yonge: “We cannot act in the same way with respect to the heavenly phænomena: these productions may depend upon several different causes, and we may give many different explanations on this subject, equally agreeing with the impressions of the senses. Besides, it is not here a question about reasoning on new principles, and of laying down, à priori, rules for the interpretation of nature; the only guides for us to follow are the appearances themselves; for that which we have in view is not a set of systems and vain opinions, but much rather a life exempt from every kind of disquietude.

“The heavenly phænomena do not inspire those who give different explanations of them, conformable with appearances, instead of explaining them by hypothesis, with any alarm. But if, abandoning hypothesis, one at the same time renounces the attempt to explain them by means of analogies founded on appearances, then one is placing one’s self altogether at a distance from the science of nature, in order to fall into fables. It is possible that the heavenly phænomena may present some apparent characters which appear to assimilate them to those phænomena which we see taking place around ourselves, without there being any real analogy at the bottom. For the heavenly phænomena may depend for their production on many different causes;

EpicureanFriends: Same as the Bailey text above.

Hicks: However, we must observe each fact as presented, and further separate from it all the facts presented along with it, the occurrence of which from various causes is not contradicted by facts within our experience. "A world is a circumscribed portion of the universe, which contains stars and earth and all other visible things, cut off from the infinite, and terminating in an exterior which may either revolve or be at rest, and be round or triangular or of any other shape whatever. All these alternatives are possible: they are contradicted by none of the facts in this world, in which an extremity can nowhere be discerned.

Yonge: nevertheless, we must observe the appearances presented by each, and we must distinguish the different circumstances which attach to them, and which can be explained in different manners by means of analogous phænomena which arise under our eyes.

“The world is a collection of things embraced by the heaven, containing the stars, the earth, and all visible objects. This collection, separated from the infinite, is terminated by an extremity, which is either rare, or dense, or revolving, or in a state of repose, or of a round, or triangular, or of some shape or other in fact, for it may be of any shape, the dissolution of which must bring the destruction of everything which they embrace. In fact, it can take place in every sort of way, since there is not one of those things which are seen which testifies against this world in which we cannot detect any extremity;

EpicureanFriends: Same as the Bailey text above.

Hicks: "That there is an infinite number of such worlds can be perceived, and that such a world may arise in a world or in one of the intermundia (by which term we mean the spaces between worlds) in a tolerably empty space and not, as some maintain, in a vast space perfectly clear and void. It arises when certain suitable seeds rush in from a single world or intermundium, or from several, and undergo gradual additions or articulations or changes of place, it may be, and waterings from appropriate sources, until they are matured and firmly settled in so far as the foundations laid can receive them.

Yonge: and that such worlds are infinite in number is easily seen, and also that such a world can exist both in the world and in the μετακόσμιον, as we call the space between the worlds, being a huge space made up of plenum and vacuum, but not, as some philosophers pretend, an immensity of space absolutely empty. This production of a world may be explained thus: seeds suitably appropriated to such an end may emanate either from one or from several worlds, or from the space that separates them; they flow towards a particular point where they become collected together and organized; after that, other germs come to unite them together in such a way as to form a durable whole, a basis, a nucleus to which all successive additions unite themselves.

EpicureanFriends: Same as the Bailey text above.

Hicks: For it is not enough that there should be an aggregation or a vortex in the empty space in which a world may arise, as the necessitarians hold, and may grow until it collide with another, as one of the so-called physicists says. For this is in conflict with facts. "The sun and moon and the stars generally were not of independent origin and later absorbed within our world; but they at once began to take form and grow by the accretions and whirling motions of certain substances of finest texture, of the nature either of wind or fire, or of both; for thus sense itself suggests.

Yonge: “One must not content one’s self in this question with saying, as one of the natural philosophers has done, that there is a re-union of the elements, or a violent motion in the vacuum under the influence of necessity, and that the body which is thus produced increases until it comes to crash against some other; for this doctrine is contrary to appearances.

“The sun, the moon, and the other stars, were originally formed separately, and were afterwards comprehended in the entire total of the world. All the other objects which our world comprises, for instance, the earth and the sea, were also formed spontaneously, and subsequently gained size by the addition and violent movement of light substances, composed of elements of fire and air, or even of these two principles at once. This explanation, moreover, is in accordance with the impressions of the senses.

EpicureanFriends: Same as the Bailey text above.

Hicks: "The size of the sun and the remaining stars relatively to us is just as great as it appears. But in itself and actually it may be a little larger or a little smaller, or precisely as great as it is seen to be. For so too fires of which we have experience are seen by sense when we see them at a distance. And every objection brought against this part of the theory will easily be met by anyone who attends to plain facts, as I show in my work On Nature.

Yonge: “As to the magnitude of the sun and of the other stars, it is as far as we are concerned, such as it appears to us to be.”

(This same doctrine is reproduced, and occurs again in the eleventh book of his treatise on Nature; where he says, “If the distance has made it lose its size, à fortiori, it would take away its brilliancy; for colour has not, any more than size, the property of traversing distance without alteration.”)

“But, considered by itself, the sun may be a little greater or a little smaller than it appears; or it may be just such as it looks; for that is exactly the case with the fires of common occurrence among men, which are perceived by the senses at a distance. Besides, all the difficulties on this subject will be easily explained if one attends to the clear evidence of the perceptions, as I have shown in my books about Nature.

EpicureanFriends: Same as the Bailey text above.

Hicks: And the rising and setting of the sun, moon, and stars may be due to kindling and quenching, provided that the circumstances are such as to produce this result in each of the two regions, east and west: for no fact testifies against this. Or the result might be produced by their coming forward above the earth and again by its intervention to hide them: for no fact testifies against this either. And their motions may be due to the rotation of the whole heaven, or the heaven may be at rest and they alone rotate according to some necessary impulse to rise, implanted at first when the world was made

Yonge: “The rising and setting of the sun, of the moon, and of the stars, may depend on the fact of their becoming lighted up, and extinguished alternately, and in the order which we behold. One may also give other reasons for this phænomenon, which are not contradicted by any sensible appearances; accordingly, one might explain them by the passage of the stars above and below the earth, for the impressions of the senses agree also with this supposition.

“As to their motion, one may make that depend on the circular movement of the entire heaven. One may also suppose that the stars move, while the heaven itself is immoveable; for there is nothing to prevent the idea that originally, before the formation of the world, they may have received, by the appointment of fate, an impulse from east to west,

EpicureanFriends: Same as the Bailey text above.

Hicks: ... and this through excessive heat, due to a certain extension of the fire which always encroaches upon that which is near it. "The turnings of the sun and moon in their course may be due to the obliquity of the heaven, whereby it is forced back at these times. Again, they may equally be due to the contrary pressure of the air or, it may be, to the fact that either the fuel from time to time necessary has been consumed in the vicinity or there is a dearth of it. Or even because such a whirling motion was from the first inherent in these stars so that they move in a sort of spiral. For all such explanations and the like do not conflict with any clear evidence, if only in such details we hold fast to what is possible, and can bring each of these explanations into accord with the facts, unmoved by the servile artifices of the astronomers.

Yonge: and that now their movement continues in consequence of their heat, as the fire naturally proceeds onwards in order to seek the aliment which suits it.

“The intertropical movements of the sun and moon may depend, either on the obliquity impressed by fate on the heaven at certain determined epochs, or on the resistance of the air, or on the fact that these ignited bodies stand in need of being nourished by a matter suitable to their nature, and that this matter fails them; or finally, they may depend on the fact of their having originally received an impulse which compels them to move as they do describing a sort of spiral figure. The sensible evidence does not in the least contradict these different suppositions, and all those of the same kind which one can form, having always a due regard to what is possible, and bringing back each phænomenon to its analogous appearances in sensible facts, without disquieting one’s self about the miserable speculations of the astronomers.

EpicureanFriends: Same as the Bailey text above.

Hicks: "The waning of the moon and again her waxing might be due to the rotation of the moon's body, and equally well to configurations which the air assumes; further, it may be due to the interposition of certain bodies. In short, it may happen in any of the ways in which the facts within our experience suggest such an appearance to be explicable. But one must not be so much in love with the explanation by a single way as wrongly to reject all the others from ignorance of what can, and what cannot, be within human knowledge, and consequent longing to discover the indiscoverable. Further, the moon may possibly shine by her own light, just as possibly she may derive her light from the sun;

Yonge: “The evacuations and subsequent replenishings of the moon may depend either on a conversion of this body, or on the different forms which the air when in a fiery state can adopt, or perhaps to the interposition of another body, or lastly, to some one of the causes by which one gives account of the analogous phænomena which pass under our eyes. Provided, however, that one does not obstinately adopt an exclusive mode of explanation; and that, for want of knowing what is possible for a man to explain, and what is inaccessible to his intelligence; one does not throw one’s self into interminable speculations.

“It may also be possibly the case that the moon has a light of her own, or that she reflects that of the sun.

EpicureanFriends: Same as the Bailey text above.

Hicks: for in our own experience we see many things which shine by their own light and many also which shine by borrowed light. And none of the celestial phenomena stand in the way, if only we always keep in mind the method of plural explanation and the several consistent assumptions and causes, instead of dwelling on what is inconsistent and giving it a false importance so as always to fall back in one way or another upon the single explanation. The appearance of the face in the moon may equally well arise from interchange of parts, or from interposition of something, or in any other of the ways which might be seen to accord with the facts.

Yonge: For we see around us many objects which are luminous of themselves, and many others which have only a borrowed light. In a word, one will not be arrested by any of the celestial phænomena, provided that one always recollects that there are many explanations possible; that one examines the principles and reasons which agree with this mode of explanation,

EpicureanFriends: Same as the Bailey text above.

Hicks: For in all the celestial phenomena such a line of research is not to be abandoned; for, if you fight against clear evidence, you never can enjoy genuine peace of mind. "An eclipse of the sun or moon may be due to the extinction of their light, just as within our own experience this is observed to happen; and again by interposition of something else – whether it be the earth or some other invisible body like it. And thus we must take in conjunction the explanations which agree with one another, and remember that the concurrence of more than one at the same time may not impossibly happen.

Yonge: and that one does not proceed in accounting for the facts which do not agree with this method, to suffer one’s self to be foolishly carried away, and to propose a separate explanation for each phænomenon, sometimes in one way, and sometimes in another.

“The appearance of a face in the orb of the moon, may depend either on a displacement of its parts, or on the interposition of some obstacle, or on any other cause capable of accounting for such an appearance. For one must not neglect to apply this same method to all the heavenly phænomena; for, from the moment when one comes to any point of contradiction to the evidence of the senses, it will be impossible to possess perfect tranquillity and happiness.

“The eclipses of the sun and moon may depend either on the fact that these stars extinguish themselves, a phænomenon which we often see produced under our eyes, or on the fact of other bodies, the earth, the heaven, or something else of the same kind interposing, between them and us. Besides, we must compare the different modes of explanation appropriate to phænomena, and recollect that it is not impossible that many causes may at one and the same time concur in their production.

(He says the same thing in the twelfth book of his treatise on Nature; and adds that the eclipses of the sun arise from the fact that it penetrates into the shade of the moon, to quit it again presently; and the eclipses of the moon from the fact of its entering into the shade of the earth. We also find the same doctrine asserted by Diogenes, the Epicurean, in the first book of his Select Opinions.)

EpicureanFriends: Same as the Bailey text above.

Hicks: "And further, let the regularity of their orbits be explained in the same way as certain ordinary incidents within our own experience; the divine nature must not on any account be adduced to explain this, but must be kept free from the task and in perfect bliss. Unless this be done, the whole study of celestial phenomena will be in vain, as indeed it has proved to be with some who did not lay hold of a possible method, but fell into the folly of supposing that these events happen in one single way only and of rejecting all the others which are possible, suffering themselves to be carried into the realm of the unintelligible, and being unable to take a comprehensive view of the facts which must be taken as clues to the rest.

Yonge: “The regular and periodical march of these phænomena has nothing in it that ought to surprise us, if we only attend to the analogous facts which take place under our eyes. Above all things let us beware of making the Deity interpose here, for that being we ought to suppose exempt from all occupation and perfectly happy; otherwise we shall be only giving vain explanations of the heavenly phænomena, as has happened already to a crowd of authors. Not being able to recognize what is really possible, they have fallen into vain theories, in supposing that for all phænomena there was but one single mode of production, and in rejecting all other explanations which are founded on probability; they have adopted the most unreasonable opinions, for want of placing in the front the study of the heavenly phænomena, and of sensible facts, which ought to serve to explain the first.

EpicureanFriends: Same as the Bailey text above.

Hicks: "The variations in the length of nights and days may be due to the swiftness and again to the slowness of the sun's motion in the sky, owing to the variations in the length of spaces traversed and to his accomplishing some distances more swiftly or more slowly, as happens sometimes within our own experience; and with these facts our explanation of celestial phenomena must agree; whereas those who adopt only one explanation are in conflict with the facts and are utterly mistaken as to the way in which man can attain knowledge.

Yonge: “The differences in the length of nights and days may arise from the fact that the passage of the sun above the earth is more or less rapid; and more or less slow, according to the length of the regions which it has to pass through. Or, again, to the fact that certain regions are passed through more rapidly than others, as is seen to be the case by our own eyes, in those things to which we can compare the heavenly phænomena. As to those who on this point admit only one explanation as possible, they put themselves in opposition to facts, and lose sight of the bounds set to human knowledge.

EpicureanFriends: Same as the Bailey text above.

Hicks: "The signs in the sky which betoken the weather may be due to mere coincidence of the seasons, as is the case with signs from animals seen on earth, or they may be caused by changes and alterations in the air. For neither the one explanation nor the other is in conflict with facts, and it is not easy to see in which cases the effect is due to one cause or to the other.

Yonge: “The prognostics which are derived from the stars may, like those which we borrow from animals, arise from a simple coincidence. They may also have other causes, for example, some change in the air; for these two suppositions both harmonize equally with facts; but it is impossible to distinguish in what case one is to attribute them to the one cause or to the other.

EpicureanFriends: Same as the Bailey text above.

Hicks: "Clouds may form and gather either because the air is condensed under the pressure of winds, or because atoms which hold together and are suitable to produce this result become mutually entangled, or because currents collect from the earth and the waters; and there are several other ways in which it is not impossible for the aggregations of such bodies into clouds to be brought about. And that being so, rain may be produced from them sometimes by their compression, sometimes by their transformation;

Yonge: “The clouds may be formed either by the air condensed under the pressure of the winds, or by the agency of atoms set apart for that end, or by emanations from the earth and waters, or by other causes. For there are a great number which are all equally able to produce this effect. When the clouds clash with one another, or undergo any transformation, they produce showers; and the long rains are caused by the motion of the clouds when moved from places suitable to them through the air,

EpicureanFriends: Same as the Bailey text above.

Hicks: or again may be caused by exhalations of moisture rising from suitable places through the air, while a more violent inundation is due to certain accumulations suitable for such discharge. Thunder may be due to the rolling of wind in the hollow parts of the clouds, as it is sometimes imprisoned in vessels which we use; or to the roaring of fire in them when blown by a wind, or to the rending and disruption of clouds, or to the friction and splitting up of clouds when they have become as firm as ice. As in the whole survey, so in this particular point, the facts invite us to give a plurality of explanations. Lightnings too happen in a variety of ways. For when the clouds rub against each other and collide, that collocation of atoms which is the cause of fire generates lightning; or it may be due to the flashing forth from the clouds, by reason of winds, of particles capable of producing this brightness; or else it is squeezed out of the clouds when they have been condensed either by their own action or by that of the winds; or again, the light diffused from the stars may be enclosed in the clouds, then driven about by their motion and by that of the winds, and finally make its escape from the clouds; or light of the finest texture may be filtered through the clouds (whereby the clouds may be set on fire and thunder produced), and the motion of this light may make lightning; or it may arise from the combustion of wind brought about by the violence of its motion and the intensity of its compression;

Yonge: when a more violent inundation than usual takes place, from collections of some masses calculated to produce these effects. Thunder possibly arises from the movement of the winds revolving in the cavities of the clouds; of which we may see an image in vessels in our own daily use. It may also arise from the noise of fire acted upon by the wind in them, and from the tearings and ruptures of the clouds when they have received a sort of crystaline consistency. In a word, experience drawn from our senses, teaches us that all these phænomena, and that one in particular, may be produced in many different manners.

“One may also assign different causes to the lightning; either the shock and collision of the clouds produce a fiery appearance, which is followed by lightning; or the lighting up of the clouds by the winds, produces this luminous appearance; or the mutual pressure of the clouds, or that of the wind against them, disengages the lightning. Or, one might say, that the interception of the light diffused from the stars, arrested for a time in the bosom of the clouds, is driven from them subsequently by their own movements, and by those of the winds, and so escapes from their sides; that the lightning is an extremely subtile light that evaporates from the clouds; that the clouds which carry the thunder are collected masses of fire; that the lightning arises from the motion of the fire, or from the conflagration of the wind, in consequence of the rapidity and continuousness of its motion. One may also attribute the luminous appearance of lightning to the rupture of the clouds under the action of the winds,

EpicureanFriends: Same as the Bailey text above.

Hicks: or, when the clouds are rent asunder by winds, and the atoms which generate fire are expelled, these likewise cause lightning to appear. And it may easily be seen that its occurrence is possible in many other ways, so long as we hold fast to facts and take a general view of what is analogous to them. Lightning precedes thunder, when the clouds are constituted as mentioned above and the configuration which produces lightning is expelled at the moment when the wind falls upon the cloud, and the wind being rolled up afterwards produces the roar of thunder; or, if both are simultaneous, the lightning moves with a greater velocity towards us

Yonge: or to the fall of inflammable atoms. Lastly, one may easily find a number of other explanations, if one applies to sensible facts, in order to search out the analogies which they present to the heavenly phænomena.

“Lightning precedes thunder, either because it is produced at the same moment that the wind falls on the cloud, while the noise is only heard at the instant when the wind has penetrated into the bosom of the cloud; or, perhaps, the two phænomena being simultaneous, the lightning arrives among us more rapidly than the noise of the thunder-bolt, as is in fact remarked in other cases when we see at a distance the clash of two objects.

EpicureanFriends: Same as the Bailey text above.

Hicks: and the thunder lags behind, exactly as when persons who are striking blows are observed from a distance. A thunderbolt is caused when winds are repeatedly collected, imprisoned, and violently ignited; or when a part is torn asunder and is more violently expelled downwards, the rending being due to the fact that the compression of the clouds has made the neighbouring parts more dense; or again it may be due like thunder merely to the expulsion of the imprisoned fire, when this has accumulated and been more violently inflated with wind and has torn the cloud, being unable to withdraw to the adjacent parts because it is continually more and more closely compressed – (generally by some high mountain where thunderbolts mostly fall).

Yonge: “The thunderbolt may be produced either by a violent condensation of the winds, or by their rapid motion and conflagration. It may arise from the fact of the winds meeting in places which are too dense, in consequence of the accumulation of clouds, and then a portion of the current detaches itself and proceeds towards the lower situations; or else it may be caused by the fire which is contained in the bosom of the clouds precipitating itself downwards. As one may suppose that an immense quantity of fire being accumulated in the clouds dilates, violently bursting the substance which envelops it, because the resistance of the centre hinders it from proceeding further. This effect is especially produced in the neighbourhood of high mountains; and, accordingly, they are very frequently struck with the thunderbolts.

EpicureanFriends: Same as the Bailey text above.

Hicks: And there are several other ways in which thunderbolts may possibly be produced. Exclusion of myth is the sole condition necessary; and it will be excluded, if one properly attends to the facts and hence draws inferences to interpret what is obscure. "Fiery whirlwinds are due to the descent of a cloud forced downwards like a pillar by the wind in full force and carried by a gale round and round, while at the same time the outside wind gives the cloud a lateral thrust; or it may be due to a change of the wind which veers to all points of the compass as a current of air from above helps to force it to move; or it may be that a strong eddy of winds has been started and is unable to burst through laterally because the air around is closely condensed.

Yonge: In short, one may give a number of explanations of the thunderbolt; but we ought, above all things, to be on our guard against fables, and this one will easily be, if one follows faithfully the sensible phænomena in the explanation of these things, which are not perceived, except indirectly.

“Hurricanes (πρηστῆρες) may be caused either by the presence of a cloud, which a violent wind sets in motion and precipitates with a spiral movement towards the lower regions, or by a violent gust which bears a cloud into the neighbourhood of some other current, or else by the mere agitation of the wind by itself, when air is brought together from the higher regions and compressed without being able to escape on either side, in consequence of the resistance of the air which surrounds it;

EpicureanFriends: Same as the Bailey text above.

Hicks: And when they descend upon land, they cause what are called tornadoes, in accordance with the various ways in which they are produced through the force of the wind; and when let down upon the sea, they cause waterspouts. "Earthquakes may be due to the imprisonment of wind underground, and to its being interspersed with small masses of earth and then set in continuous motion, thus causing the earth to tremble. And the earth either takes in this wind from without or from the falling in of foundations, when undermined, into subterranean caverns, thus raising a wind in the imprisoned air. Or they may be due to the propagation of movement arising from the fall of many foundations and to its being again checked when it encounters the more solid resistance of earth.

Yonge: when the hurricane descends towards the earth, then there result whirlwinds in proportion to the rapidity of the wind that has produced them; and this phænomenon extends over the sea also. “Earthquakes may arise from the wind penetrating into the interior of the earth, or from the earth itself receiving incessantly the addition of exterior particles, and being in incessant motion as to its constituent atoms, being in consequence disposed to a general vibration. That which permits the wind to penetrate is the fact that falls take place in the interior, or that the air being impressed by the winds insinuates itself into the subterraneous caverns. The movement which numberless falls and the re-action of the earth communicate to the earth, when this motion meets bodies of greater resistance and solidity, is sufficient to explain the earthquakes.

EpicureanFriends: Same as the Bailey text above.

Hicks: And there are many other causes to which these oscillations of the earth may be due. "Winds arise from time to time when foreign matter continually and gradually finds its way into the air; also through the gathering of great store of water. The rest of the winds arise when a few of them fall into the many hollows and they are thus divided and multiplied. "Hail is caused by the firmer congelation and complete transformation, and subsequent distribution into drops, of certain particles resembling wind: also by the slighter congelation of certain particles of moisture and the vicinity of certain particles of wind which at one and the same time forces them together and makes them burst, so that they become frozen in parts and in the whole mass.

Yonge: One might, however, give an account of them in several other ways. “Winds are caused, either by the successive and regular addition of some foreign matter, or else by the re-union of a great quantity of water; and the differences of the winds may arise from the fact that some portions of this same matter fall into the numerous cavities of the earth, and are divided there. “Hail is produced by an energetic condensation acting on the ethereal particles which the cold embraces in every direction; or, in consequence of a less violent condensation acting however on aqueous particles, and accompanied by division, in such a manner as to produce, at the same time, the re-union of certain elements and of the collective masses; or by the rupture of some dense and compact mass which would explain at the same time, the numerousness of the particles and their individual hardness.

EpicureanFriends: Same as the Bailey text above.

Hicks: The round shape of hailstones is not impossibly due to the extremities on all sides being melted and to the fact that, as explained, particles either of moisture or of wind surround them evenly on all sides and in every quarter, when they freeze. "Snow may be formed when a fine rain issues from the clouds because the pores are symmetrical and because of the continuous and violent pressure of the winds upon clouds which are suitable; and then this rain has been frozen on its way because of some violent change to coldness in the regions below the clouds. Or again, by congelation in clouds which have uniform density a fall of snow might occur through the clouds which contain moisture being densely packed in close proximity to each other; and these clouds produce a sort of compression and cause hail, and this happens mostly in spring.

Yonge: As to the spherical form of the hail, one may easily account for that by admitting that the shocks which it receives in every direction make all the angles disappear, or else that at the moment when the different fragments are formed, each of them is equally embraced on all sides by aqueous or ethereal particles.

“Snow may be produced by a light vapour full of moisture which the clouds allow to escape by passages intended for that end, when they are pressed, in a corresponding manner, by other clouds, and set in motion by the wind. Subsequently, these vapours become condensed in their progress under the action of the cold which surrounds the clouds in the lower regions. It may also be the case that this phænomenon is produced by clouds of a slight density as they become condensed.

EpicureanFriends: Same as the Bailey text above.

Hicks: And when frozen clouds rub against each other, this accumulation of snow might be thrown off. And there are other ways in which snow might be formed. "Dew is produced by the gathering together through the air of particles from damp regions or places which contain water,

Yonge: In this case the snow which escapes from the clouds would be the result of the contact, or approximation of the aqueous particles, which in a still more condensed state produce hail. This effect is most especially produced in the air. Snow, again, may result from the collection of clouds previously condensed and solidified; or from a whole army of other causes.

“Dew proceeds from a re-union of particles contained in the air calculated to produce this moist substance. These particles may be also brought from places which are moist or covered with water (for in those places, above all others, it is that dew is abundant). These then re-unite, again resume their aqueous form, and fall down. The same phænomenon takes place in other cases before our own eyes under many analogies.

“Hoar-frost is dew congealed by the influence of the cold air that surrounds it.

“Ice is formed either by the detrition of round atoms contained in the water, and the re-union at scalene and acute angles of the atoms which exist in the water, or by an addition from without of these latter particles, which penetrating into the water, solidify it by driving away an equal amount of round atoms.

EpicureanFriends: Same as the Bailey text above.

Hicks: whereby not only dew is produced but also hoarfrost – when such particles as these have been chilled either in the way I have described or by the freezing of moisture in the upper regions. For even ice is formed by the freezing of the watery particles contained in rain when there has been an influx of certain chilled particles capable of freezing the drops of moisture. "The rainbow is caused by light shining from the sun upon watery atmosphere: when the light falls in a certain way, certain colours are produced, either because these colours are natural to the light so falling or because the particles which make up the damp atmosphere have some special power of producing these combinations of colours out of sunlight.

Yonge: “The rainbow may be produced by the reflection of the solar rays on the moist air; or it may arise from a particular property of light and air, in virtue of which these particular appearances of colour are formed, either because the shades which we perceive result directly from this property, or because, on the contrary, it only produces one single shade, which, reflecting itself on the nearest portions of the air, communicates to them the tints which we observe.

EpicureanFriends: Same as the Bailey text above.

Hicks: The shape of the bow is due to the reflexion of the light to our eyes uniformly from all the drops at a certain angle; or it may be because the particles which reflect it have assumed a uniform configuration which must needs produce this circular shape.

"And its disappearance is due to the incidence of the sun's rays being broken either by the density of the cloud or by the disappearance of the watery particles themselves or their change into something else. "A halo round the moon is produced by the incidence of damp air upon the moon's light in such a way that the air assumes a circular configuration all round it and reflects or refracts the light in this circular form; and this occurs either because the air is driven round the moon by some current from outside, or because the heat from the moon herself affects the air in such a way as to produce this equable and circular configuration.

Yonge: As to the circular form of the rainbow, that depends either on the fact of the sight perceiving an equal distance in every direction, or the fact of the atoms taking this form when re-uniting in the air; or it may be caused by its detaching from the air which moves towards the moon, certain atoms which, being re-united in the clouds, give rise to this circular appearance.

“The lunar halo arises from the fact of the air, which moves towards the moon from all quarters, uniformly intercepting the rays emitted by this star, in such a way as to form around it a sort of circular cloud which partially veils it. It may also arise from the fact of the moon uniformly rejecting from all quarters, the air which surrounds it, in such a manner as to produce this circular and opaque covering. And perhaps this opaqueness may be caused by some particles which some current brings from without; perhaps also, the heat communicates to the moon the property of emitting by the pores in its surface, the particles by which this effect is produced.

EpicureanFriends: Same as the Bailey text above.

Hicks: "Comets occur when fire is collected together in certain regions of the upper air at certain times, the circumstances being favourable to such an aggregation; or when at certain seasons the heaven above us has some peculiar movement so that such stars become visible; or even when certain fiery bodies are started into motion by some means or other and fall into regions beneath where we can see them. Their disappearance is due to causes opposite to these, their fire being quenched or their motion checked or the supply of matter which fed them being exhausted.

Yonge: “Comets arise either from the fact, that in the circumstances already stated, there are partial conflagrations in certain points of the heaven; or, that at certain periods, the heaven has above our heads a particular movement which causes them to appear. It may also be the case, that being themselves endowed with a peculiar movement, they advance at the end of certain periods of time, and in consequence of particular circumstances, towards the places which we inhabit. The opposite reasons explain their disappearance.

EpicureanFriends: Same as the Bailey text above.

Hicks: "Those stars which are called 'fixed' may owe their apparent immobility to the whole heaven moving round uniformly so that they keep their places relatively to one another; or it may be that the regions where they are do not admit of any other motion than this uniform revolution, whereas in other regions there are many different motions going on at once among the heavenly bodies. And those which are called 'planets' or wanderers may have a motion contrary to that of the heaven either because some vortex outside them forces them to move so, or because they have some inherent power of their own to resist the motion of the heaven and go their own way, or because the supply of nourishment on which they depend lies in a different direction from that of the fixed stars. (Editor's note: the source transcription's own section numbers were misaligned here; this excerpt has been matched to the correct passage by content.)

Yonge: “Certain stars return to the same point in accomplishing their revolutions; and this arises, not only as has been sometimes believed, from the fact of the pole of the world, around which they move, being immoveable, but also from the fact that the gyrations of the air which surrounds them, hinder them from deviations like the wandering stars. Perhaps also, this may be caused by the fact, that except in the route in which they move, and in which we perceive them, they do not find any material suitable to their nature. (Editor's note: the source transcription's own section numbers were misaligned here; this excerpt has been matched to the correct passage by content.)

EpicureanFriends: Same as the Bailey text above.

Hicks: "Their regular movement, when they have it, is due either to their revolving in a circle (as some of the other stars do also), being driven by the motion of the heaven round certain fixed points, or to their finding before them a succession of suitable fuel so that they are borne from one to the next as though they knew their way; or it may be that certain currents of air have arisen in those regions and are driving them steadily in one direction. And when they move irregularly, this too is due to a variety of causes: either the matter on which they feed is unevenly distributed so that they swerve to find it, or the air which drives them shifts and turns aside into different channels, or their own composition is such that they have not a straight but a crooked course. (Editor's note: the source transcription's own section numbers were misaligned here; this excerpt has been matched to the correct passage by content.)

"For in all these celestial phenomena the main point for the student of nature to insist upon is this: that no phenomena are inconsistent with there being several possible explanations, and that nothing must be accepted which involves the agency of a god – seeing that the divine nature must be kept apart from all trouble or change, dwelling in utter blessedness far from the world of men. Unless this principle be accepted, all our explanations of celestial phenomena will be thrown into confusion by superstition; and some there are who, because they do not follow this principle but allow only one explanation to be possible and reject all others, have fallen into vain imaginings and lost the power to reason about what really falls within human knowledge.

Yonge: One may also explain this phænomenon in many other manners, reasoning according to sensible facts; thus, it is possible that certain stars may be wandering because that is the nature of their movements, and, for the same reason, others may be immoveable. It is also possible, that the same necessity which has originally given them their circular movement, may have compelled some to follow their orbit regularly, and have subjected others to an irregular progress; we may also suppose that the uniform character of the centre which certain stars traverse favour their regular march, and their return to a certain; and that in the case of others, on the contrary, the differences of the centre produce the changes which we observe. Besides, to assign one single cause to all these phænomena, when the experience of our senses suggests us several, is folly. It is the conduct of ignorant astronomers covetous of a vain knowledge, who, assigning imaginary causes to facts, wish to leave wholly to the Deity the care of the government of the universe. (Editor's note: the source transcription's own section numbers were misaligned here; this excerpt has been matched to the correct passage by content.)

EpicureanFriends: Same as the Bailey text above.

Hicks: (This passage was not found in the source transcription used for this page.)

Yonge: “Some stars appear to be left behind by others in their progress; this arises either from the fact of their having a slower motion, though traversing the same circle; or, because, though they are drawn on by the same propelling power, they have, nevertheless, a movement proper to themselves in a contrary direction; or it may be caused by the fact that, though all are placed in the same sphere of movement, still some have more space to traverse, and others less.

EpicureanFriends: Same as the Bailey text above.

Hicks: "There are many other phenomena in the sky – shooting stars, bearded stars, and the like – which may all be explained as due to the motions or gatherings of fiery particles in the upper air, capable of producing these various appearances according to the circumstances of their aggregation or movement. "In all these matters the one thing needful is to keep clearly in mind the method by which we investigate them: we must look at the facts as they are observed, compare them with things we know in our own experience, and so frame such explanations as are consistent with these, allowing that several different causes may produce the same effect, and never forcing the phenomena to fit one theory only. (Editor's note: the source transcription's own section numbers were misaligned here; this excerpt has been matched to the correct passage by content.)

Yonge: To give one uniform and positive explanation of all these facts, is not consistent with the conduct of any people but those who love to flash prodigies in the eyes of the multitude.

“Falling stars may be particles detached from the stars, or fragments resulting from their collision; they may also be produced by the fall of substances which are set on fire by the action of the wind; by the re-union of inflammable atoms which are made to come together so as to produce this effect by a sort of reciprocal attraction; or else by the movement which is produced in consequence of the re-union of atoms in the very place where they meet. It may also happen that the light vapours re-unite and become condensed under the form of clouds, that they then take fire in consequence of their rotatory motion, and that, bursting the obstacles which surround them, they proceed towards the places whither the force by which they are animated drags them. In short, this phænomenon also may admit of a great number of explanations.

“The presages which are drawn from certain animals arise from a fortuitous concourse of circumstances; for there is no necessary connection between certain animals and winter. They do not produce it; nor is there any divine nature sitting aloft watching the exits of these animals, and then accomplishing signs of this kind. Nor can such folly as this occur to any being who is even moderately comfortable, much less to one which is possessed of perfect happiness.

EpicureanFriends: Same as the Bailey text above.

Hicks: (This passage was not found in the source transcription used for this page.)

Yonge: “Imprint all these precepts in your memory, O Pythocles, and so you will easily escape fables, and it will be easy for you to discover other truths analogous to these. Above all, apply yourself to the study of general principles, of the infinite, and of questions of this kind, and to the investigation of the different criteria and of the passions, and to the study of the chief good, with a view to which we prosecute all our researches. When these questions are once resolved, all particular difficulties will be made plain to you. As to those who will not apply themselves to these principles, they will neither be able to give a good explanation of these same questions, nor to reach that end to which all our researches tend.”

EpicureanFriends: Same as the Bailey text above.