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A34110 Naturall philosophie reformed by divine light, or, A synopsis of physicks by J.A. Comenius ... ; with a briefe appendix touching the diseases of the body, mind, and soul, with their generall remedies, by the same author.; Physicae ad lumen divinum reformatae synopsis. English Comenius, Johann Amos, 1592-1670. 1651 (1651) Wing C5522; ESTC R7224 114,530 304

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side neither doth it make any thing against this that the vvater of the sea boiling is not so hot as the water of a boiling pot For here the vast quantity doth not admit of so great heat over such deep gulfes For the water of a kettle heats at the bottome bu the superficies begin to swell and turn about before they heat XVII Vapours within the sea are chiefly generated by by the fire under ground They referre it commonly to the caelestiall fire the Sun and the Moon But that is likely to be as true as that we see a pot of water to boile set in the sun though never so hot For who ever saw that the Sun may lick the superficies of the water and so consume it by little and little and turn it into vapour but nothing can make it boil at the bottome but fire put under it Therefore the cause of the vapours within the sea must of necessity be placed underneath namely that fire under ground which the whole nature of inferiour things demonstrate to be shut up there XVIII The vapours and tides of the sea are provoked by the heat of heaven the Sun A labouring man or a traveller sweats easily enough by his inward heat stirred up by the motion of his body but a great deal more easily in the heat of Summer then in Winter and all of us sooner in a bath then else-where the outward heat provoking the inward In like manner the sea vapours and boiles vvithin but yet after the harmony of the superiour fire which is from the stars Which harmony is seen also in yielding us vvater from the clouds and fountains For in rainy vveather fountains flow more abundantly in dry vveather they dry something both which God intimated Gen. 7. v. 11. and Deut. 28. v. 23. Now the cause is the harmony of fire to fire of the caelestiall to the subterraneous c. as it shall elsewhere appear XIX The Sea flowes twice a day according as the Sun comes and goes For the Sun ascending to the Meridian attracts the vapours of the sea and causes the waters to be elevated and diffused descending to the West it suffers them to fall again Now that the waters swell again at the Sun setting and fall as he hastens to the East the cause is the same which in boyling pots where the hot water is seen to boile and to be elevated not only in that part which is toward the fire but also on the contrary but to fall again on the sides both wayes So the Sea is a caldron which the Sun the worlds fire encompassing makes to swell up on both the opposite parts but to fall in the intermediate parts so that this sea-tide following the Sun goes circularly after a perpetuall law XX The fluxe and refluxe of the sea is varied according to the motion of the Sun and Moon and the site of places For 1 in Winter it is almost insensible the Sun but weakly raising the subterrane vapours 2 When the Moon is in conjunction or opposition to the Sun the seas swell extraordinarily the force of both luminaries being joyned together to affect the inferiour things either joyntly or else oppositely Also the Moon encreasing the flowings are something retarded decreasing they are anticipated which gave occasion to the ancients to think that it was caused by the Moon alone 3 Those sea fluxes and refluxes vary also according to the divers turnings and windings of Countries and Promontories and the shorter or longer coherence of inlets with the Ocean which causeth them to be perceived in some places sooner in others later But enough of the sea tide the earthquake followes XXI An earthquake is the shaking of the superficies of the earth in any countrey arising from subterrane exhalations gathered together in great abundance and seeking a passage out Therefore it ceaseth not till the said exhalations are either scattered through the cavities of the earth or else break forth XXII Earthquakes are sometimes so horrible that they subvert Cities Mountaines Islands with an hideous bellowing howling and crashing Which formidable effects cause us to suspect that those vapours are then mixt like to those by which thunders are caused in a cloud and that not simply by the blast of the exhalations but by their burning so that they are a kinde of subterrane lightnings yet I thought good to make mention of it here together CHAP. VIII Of concrete substances namely Stars Meteors and Minerals I A Concrete thing is a vapour coagulated endued with some form For example soot clouds snow c. Note that this name of concrete and concreture is new yet fit to expresse this degree of creatures which confers nothing but coagulation and figure II The primary cause of concretion of vapours is cold which wheresoever it findeth a vapour condenseth and coagulateth it That appears in Alembicks where the vapour raised by heat and carried into the highest region of it where it is cold resolves it selfe again into water and to that end Distillours now and then wash the uppermost cap of the Alembick with cold water and make the pipes through which the concrete liquour distils to passe through a vessell of water Yet heat helps the concretion of things consuming the thinner part of the concrete and compelling the rest to harden which we see done in the generation of metals III Some concretes are Aethereall others aereall others watery others earthly Namely because some are made in the skie as stars others in the air as clouds c. others in water as a bubble c. others in the earth as stones c. every one of which come to be considered apart IV Aethereal concretes are stars and comets V Stars are fiery globes full of light and heat with which the skie glitters on every side Both the ornament of the world required this that hanging lamps should not be wanting in so lofty a palace as also the necessity of the inferiour world concerning which is the following Aphorisme Now we reckon stars in the rank of concretes because it is certain that they are made of matter and light Stars were produced in so great number upon very great necessity Namely 1 To heat the earth with a various temperature 2 To make the various harmony of times 3 To inspire a various form into the creatures For so great variety could not be induced into the lower world without such variety in coelestiall things VII God placed the greatest number of stars in the highest heaven round about that they might irradiate the earth on every side and carry about their sphear with a rapid motion of heat On which starry sphear take these following Aphorismes 1 That the motion of this sphear is finished in the space of twenty four hours 2 And because that motion is circular it is said to be made upon two hinges or immoveable points in Greek poles of vvhich the one is called the Northern or Artick pole the other the
and more and more and more purifying it from crudities III To keep the particular Ideas or forms of things For one the same spirit of the universe is afterwards diduced into many particularities by the comand of God so that there is one spirit of water another spirit of earth another of metals another of plants another of living creatures c. and then in every kind again severall species Now then that of the seed of wheat there springs not a bean much lesse a walnut or a bird c. is from the spirit of the wheat which being included in the seed formeth it self 〈◊〉 body according to its nature From the sam● spirit is the custody of the bounds of nature for example that a horse grows not to the bignesse of a mountain nor stays at the smalnesse of a cat IV To form it self bodies for the use of future operations For example the spirit of a dog being included in its seed when it begins to form the young doth not form it wings or 〈◊〉 or hands c. because it needeth not those members but four feet and other members in such sort as they are fit for that use to which they are intended Because some dogs are for pleasure others to keep the house or flocks others for hunting and that either for hares or wild bores or water foul c. namely according as the Creator mingled the spirit of living creatures that they should have Sympathy or Antipathy one with another Every ones own spirit doth form it a body fit for its end whence from the sight of the creatures onely the use of every one may be gathered as the learned think because every creature heareth its signature about it Of the nature of light I THe first light was nothing else but brightnesse or a great flame sent into the dark matter to make it visible and divisible into form For in the primitive language light and fire are of the same name 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 and 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 whence also comes the Latine word VRO and verily the light of heaven doth really both shine and burn or heat II God put into the light a threefold vertue 1 of spreading it self every way and illuminating all things 2 of moving the matter with it being taken hold of by burning and inflaming 3. of heating and thereby rarifying and attenuating the matter All these things our fire doth also because it is nothing else but light kindled in the inferiour matter III. But when as that light could not extend his motion upwards and downwards for it would have found a term forthwith it moved it self and doth still move in a round whence came the beginning of dayes IV And because the matter rarified above heat being raised by the motion of the light the grosser par●s of the matter were compelled to fall downward and to conglobate themselves in the middest of the Vniverse which was the beginning of the earth and water V The light therefore by this its threefold vertue light motion and heat introduced contrariety into the World For darknesse was opposite to light rest to motion cold to heat whence came other contraries besides moist and dry thin and thick heavy and light c. of which c. 4. VI From the light therefor is the disposition and adorning of the whole World For the light is the onely fountain both of visibility and of motion and of heat take light out of the World and all things will return into a Chaos For if all things lose their colours and their formes in the night when the Sun is absent and living creatures and plants die in winter by reason of the Suns operation being not strong enough and the earth and the water do nothing but freeze what do you think would be if the luminaries of heaven were quite extinguished Therefore all things in the visible World throughout are and are made of the matter in the spirit but by the fire or light CHAP. III. Of the motion of things THe principles of things being constituted we are to see the common accidents of things which are Motion Quality and Mutation For our of the congresse of the principles if the World came first motion out of motion came quality and out of quality again came various mutations of things which three are hitherto in all created things as it shall appear I Motion is an accident of a body whereby it is transferred from place to place The doctrine of naturall motions how many they are and how they are made is the key to the understanding of all naturall actions and therefore most diligently to be observed II Motion was given to things for generation action and time For generation for nothing could be ●gotten without composition nor composed without comming together nor come together without motion For actions because there could be none without motion For time that it might be the measure of the duration of things For take the Sun and the Starres out of the World nothing can be known what where when all things will be blind dumb deaf III Motion is either simple or compound IV Simple motion is either of spirit or of light or of matter V The motion of the spirit is called agitation whereby the spirit agitates if self in the matter seeking to inform it For the living spirit would not be living if it should cease to agitate it self and strive to subdue the matter in any sort whatsoever This motion is the beginning of the generation and corruption of things For the spirit in every thing in flesh an apple a grain wood c. doth by agitating it self soften the parts that it may either receive new life or it may fly out and the thing purrifie VI The motion of the light is called diffusion whereby the light and the heat diffuse themselves into all the parts For fire were not fire nor heat hear if it should cease to diffuse it self and liquifie the matter And from this motion of the fire all the motion of the matter draws its originall as the experience of the senses testifies For grosse and cold things as wood a stone ice c. want motion of themselves which notwithstanding when fire is put to them they forthwith obtein as it may be demonstrated to the eye let there be a kettle full of water put wood underneath it behold all is quiet but kindle the wood you shall presently see motion first in the wood flame smoak and starting asunder the coals by and by in the water first evaporating afterwards turning it self round at length boyling and galloping but remove away the fire again all the motion will cease again by little and little so in a living body an animall take away heat forthwith not onely motion but also mobility will cease the members waxing stiffe Furthermore although there be divers motions in things yet the Originall is every where the same heat or fire which being included in
Elements themselves to scorch them and scorching them to attenuate them and attenuating them to resolve them into vapours of which condensed again many severall species of things are progenerated Now then the nature of vapours shall be laid open in the following Aphorismes I Vapour is an Element rarified mixed with another Element For example the vapour of water what is it but water rarified and scattered in the air smoak what is it but an exhalation of wood or other matter resolved II Vapour is generated of the grosser Elements earth water air as of all mixt bodies Of water the matter is evident For being set to the fire it evaporates visibly set in the sun it evaporates sensibly because even whole Pools Rivers Lakes are dried up by little and little by the heat of the sun That the earth exhales you may know by sense if you put a clot into a dish of earth or pewter and pour in water so oft upon it and let it evapourate with the heat till there is nothing left neither of the water nor of the clay For what is become of the clot it is sure enough turned into aire with the parts of the water The vapour of air is invisible yet it appears that there is some 1 In a living body where all acknowledge that there are evaporations through the skin and the hair For then the vapours that go out what are they but the vapours of the inward vapours far more subtle then the vapours of water 2 Fruits herbs spices c. dried yea very dry spread from them an odour now an odour what is it but an exhalation But not in this place a watery exhalation being that there is not any thing watery left in them therefore airy That mixt bodies do vapour is without doubt forasmuch as the Elements of which they do consist do vapour Understand not only soft bodies sulphur salt herbs flesh c. but the very hardest For how could a thunder-bolt be generated in the clouds if stony vapours did not ascend into the cloud and it is certain that stones exposed to the air for some ages as in high towers grow porous how but by evaporation and what is the melting of metals but a kind of vaporation for though the metall return to its consistency yet not in the same quantity because something is evaporated by putting to the heat III Heat is the efficient cause of vapour which withersoever it diffuseth it selfe attenuating the matter of bodies turns it into vapour For this is the perpetuall virtue of heat to rarifie attenuate and diffuse IV All is full of vapour throughout the world For heat the begetter of vapours is no where wanting so that the World is nothing else but a great Vaporarie or Stove For the earth doth alwayes nourish infinite store of vapours in its bowels and the sea boiles daily vvith inward vapours and the air is stuft full of them every vvhere And vve shall see hereafter that the skie is not altogether free from them But living bodies of Animals and Plants are no●hing but shops of vapours and as it vvere a kind of Alembecks perpetually vaporing as long as they have life or heat V Vapours are generated for the progenerating of other things For all things are made of the Elements as it is vvell known Stones Herbs Animals c. but because they cannot be made unlesse the Elements themselves be first founded they must of necessity be melted vvhich is done vvhen they are resolved into vapours and variously instilled into things to put on severall formes And hence it is that Moses testifies that the first seven days of the world when there was yet no rain a vapour went up from the earth to water the whole earth that is all things growing out of the earth Read with attention Gen. 2. ver 4 5 6. VI Vapours are the matter of all bodies For vvho knoweth not that vvaters and oiles are gathered out of the vapours of Alembicks vvho seeth not also that smoak in a chimney turns into soot that is black dust yea that soot gets into the wals of chimneys and turnes into a stony hardnesse After the same manner therefore that clouds rain hail stones herbs are made of the condensed vapours of the Elements and living creatures themselves and in them bloud flesh bones hairs are nothing but vapours concrete vvill appear more clear then the light at noon day VII Vapours then are coagulated some into liquid matter as water spittle flesh or pulp some into consistent matter as stones bones wood c. That appears because those liquid things may be turned into vapours and consistent things into smoke which they could not if they were not made of them for every thing may be resolved into that onely of which it is made VIII The motion of vapours with us is upwards because among the thicker elements they obtein the nature of thinner For certainly the vapour of water is thinner then water it self yea thinner then the very air which though it consist of smaller parts yet they are compacted And therefore vapor suffers it self to be prest neither by water nor air but frees it self still getting upwards hence it is that plants grow upwards because the vapour included spreading it self tends upwards IX One vapour is moist another dry one thin another thick one mild another sharp c. For those qualities which are afterwards in bodies are initially in their rudiments that is vapours which we may know by experience For dry smoak pains the eyes which a humid vapour doth not there you have sharpnesse smels also which are nothing but exhalations of things do not they sufficiently manifest sharpnesse sweetnesse c and Chymicks gather Sulphur salt and Mercury out of smoak Therefore all qualities are in vapours more or lesse whence the bodies afterwards made of them get such or such an habit or figure X Vapours gathered together and not coagulated cause wind in the air trouble in the sea earthquake in the earth Of winds XI Wind is a fluxe of the air ordained in nature for most profitable ends For winds are 1 the besomes of the world cleansing the elements and keeping them from putrefying 2 the fan of the spirit of life causing it to vegetate in plants and all growing things 3 the charriots of clouds rains smels yea of heat cold whether soever there is need that they should be conveyed 4 Lastly they bestow strong motions for the uses of men as grinding sailing XII The ordinary cause of wind is store of exhalations one where enforcing the air to flow elsewhere We may in our hand raise a kind of wind four manner of ways namely by forcing or compressing rarifying and densifying air which shall be shewed by examples by and by and so many wayes are winds raised in the world yet they are all referred to that first cause vapours as shall be seen by and by I said that wind may be raised by
us by forcing compressing rarifying or densifying that may be shewn to children by ocular experiments for if you drive the air with a fan doth it not give a blast if you presse it when it is drawn into the bellows doth it not breath through the pipe if you lay an apple or an egge into the fire doth not the rarified humour break forth with a blast but this last will be better seen in a bowle of brasse which hath but one hole put to the fire especially if you drop in some drops of water For the air shut in with the water when they feel the heat will presently evaporate and thrust themselves out with a violent blast Which may be also seen if you put a burning wax candle into a pot well stopped having a small hole left at the side c. The fourth way is by condensation of air if for example you lay the foresaid bowle of brasse very hot upon ice and force the thin air included to be condensed again with cold you shall perceive it to draw it again from without to fill up the hollownesse of the bowle Therefore so many ways winds are made under heaven either because the air is rarified with the heat of the Sun and spreads it self or because it contracts it self with being cold and attracts from elsewhere to fill up the spaces or because a cloud scattered or falling downward or else blasts somewhere breaking out of the earth compresse the air and make it diffuse or lastly because one part of the air being moved drives others before it for here you must remember what was said before 1 that a drop of water turned into air requires an hundred times more space 2 that the air is a very liquid and moveable element and therefore being but lightly pushed gives back a long way but yet it is plain that all those motions of the air take their first rise from vapours Now because the world is a great globe it affordeth great store of blasts also both the heat of the sun above and the parching of the fire under ground begetting various vapours Hence it is understood why after a great fire there arises a wind presently even in the still air namely because much solid matter wood and stone c. is resolved into vapours and the air round about is attenuated by the heat of the fire that it must of necessity spread it self and seek a larger room XIII Winds in some countreys are certain comming at a certain time of the year and from a certain coast others are free comming from any place Note they call these 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 which is as much to say as annuall which are caused either by the mountainousnesse of the tract neer adjoyning wherein the snows are then dissolved or to be sure some other causes by reason of which vapours are then progenerated there in great abundance But you must note that those etesian winds are for the most part weak and gentle and yield to the free winds Note 2 There is also another kind of set wind common to the whole world namely a perpetuall fluxe of the whole air from the east to the west For that there is such a wind 1 they that sail about the aequator testifie 2 in the seas of Europe when a particular wind ceaseth they say also that a certain gentle gale is perceived from the east 3 and therefore Marriners are constantly of opinion that the navigation from east to west is speediliest performed 4 lastly with us in a clear and still skie the highest clouds are seene for the most part to be carried from East to West therefore wee need not doubt of this generall wind if so be any one will call it a wind For it proceeds not from exhalations but from the heaven which by its wheeling round carries the air perpetually about swiftly above here nigh the earth where the clouds are almost insensibly yet under the aequator as being in a greater Circle very notably Whence this Probleme may be profitably noted why the East wind dries but the West moistens namely because that being carried along with the air attenuates it the more but this striving against the air condenseth it XIV A gentle wind is called aura a gale a vehement wind overthrowing all it meets with procella a tempest if winded into it self turbo a whirlewind It is plain that sundry vvinds may arise in sundry places together according as matter of exhalations is afforded here and there and occasion to turn it self hither or thither Therefore if they flovv both one vvay the wind doubled is the stronger if sideways or obliquely the stronger carries away the weaker with it and there is a change of the wind which we see done often yea daily but when they come opposite to one another and fall one against another they make a storme or tempest vvhich is a fight of the vvinds till the strongest overcome and is carried vvith a horrible violence bearing dovvn all before it But contrary vvinds of aequall strength make a vvhirlvvind vvhen neither vvill give sidevvay but both vvhirl upvvards vvith a violent gyration Of the sea-tide XV The sea-tide is the daily fluxe of the sea to the shore and refluxe back again The sea hath its fluxes lesse unconstant then the air for it flows onely to the shores and back again the same vvay and tvvice a a day it flowes up and twice it ebbs again The end thereof vvithout doubt is to keepe the vvaters of the Sea from putrefying by that continuall motion But the efficient cause thereof heretofore accounted amongst the secrets of nature comes novv to be searched out of the truest grounds of naturall Philosophy and more accurate observations XVI The cause of the sea-tide are vapours within wherewith the sea swelling diffuseth it self and falling settles down again For this tide is like to the boiling of vvater seething at the fire vvhich is nothing but the stirring of the vapours raised in the vvaters by the force of the heat For it is impossible that the vvater should not be resolved into vapours by the heat impossible that the vapours should not seek a passage upvvards to their connaturals yet impossible that they should have an easie passage out of the vvater being that the superficies of the vvater yea the vvhole masse thereof being a diffused liquor like liquid glasse hath fewer pores than the earth or wood or a stone therefore it is impossible that the water should not swel rise up dash it self against the sides of the kettle and at length break in a thousand openings and give the heat dancing evapourating a passage out by reason of the vapour raised multiplied vvithin and striving upvvard all vvhich vve see in a boiling pot ●n the same manner the sea svvels by reason of the vapour that is multiplyed in the bottome of its gulfes and lifts up it self into a tumour of necessity spreads it self to the
same efficient cause of its condensation For sometimes cold condenseth a vapour as in the head and pipe of an Alembick which must needs be cooled we see sometimes the very compression it selfe or conspissation as it is plain in the roof of baths and the cover of a boiling pot But neither of these causes is wanting to beget rain being that the middle region of the air is cold and the cloud being pressed together by the vapours alwayes ascending must of necessity be dissolved And this is the cause why the burning heat of the air is a fore-teller of rain because then it is certain that the air is thickned N. 2. That rain is better for fields and gardens then river water because it hath a kind of a fatnesse mixt with it from the evaporations of the earth minerals plants and Animals wherewith it gives the earth a most profitable tincture N. 3 Sometimes wormes small fishes frogs c. fall with the rain which as it is very likely are suddenly generated within the cloud of vapours gathered together of the same nature by virtue of a living spirit admixt therewith as in the beginning at the Command of God the waters brought forth creeping things and fishes in a moment XXIX Hail is rain congealed For when the Sun beams in the greatest heat of Summer have driven away all cold from the earth into the middle region of the air it comes to passe that that vehement cold doth violently harden the drops of rain passing through them and forces them to turn to ice and therefore haile cannot be procreated in Winter the cold abiding then near the earth not on high XXX Snow is a resolution of a cloud into most small drops and withall a thickning of them with a gentle cold N. 1 It falls only in Winter because the vapours are not elevated by the weak rayes of the Sun so far as the middle that is the cold region here then near the earth the resolution is made in a milder cold and withall the congelation is very mild 2 The whitenesse of the snow is from the conjunction of the parts of the water the same comes to passe in broken ice and in the froth of water XXXI Dew is a thin vapour or else the air it selfe attracted by the leaves of plants and with their coldnesse condensed into water For it is no where but upon plants and that in the heat of summer when the plants are colder then the air it selfe Now this turnes to the great benefit of the plants for by that means they are moistned at the very driest time of the year And therefore they are produced also in those countries which know no rain XXXII Frost is congealed dew Therfore there is none but in winter when cold reigns by reason of the suns absence Of fiery Meteors Fiery meteors are those which arise from fat fumes kindled in the air the principal kinds of which are seven a falling star a flying dragon lightning flying sparks ignis fatuus a torch and ignis lambens XXXIII A falling star is a fat and viscous fume kindled by an antiperistasis that is an obsistency of the cold round about at the upper end of it the flame whereof following its fuell is carried downward till it fail also and be extinguished For they are to be seen every clear night in winter more then in summer and you may see the like spectacle if you kindle the fat fume of a candle put out with another candle put to it above This falling star is made of a grosse vapour and by reason of its grossenesse hanging together like a cord Therefore it burns so violently that falling upon a man it burns through his garment Look which way it tends with its motion it foretels wind from that part XXXIV A flying dragon is a long thick fat fume elevated in all its parts for which cause being kindled it doth not dart it selfe downward bnt side-wayes like a dragon or sparkling beam This meteors is not so often seen and therefore they that are ignorant of the naturall causes think that the Divell flies XXXV Lightning is fire kindled within a cloud which flying from the contrary cold breaks out with an horrible noise and for the most part casts the flame as far as the earth The World is the Alembick of nature the air the cap of this Alembick the sun is the fire the earth the water minerals plants c. are the things which being softned with this fire exhale vapours upward perpetually So there ascend salt sulphury nitrous c. vapours which being wrapped up in clouds put forth various effects for example When sulphury exhalations are mixt with nitrous the first of a most hot nature the second most cold they endure one another so long as till the sulphur takes fire But as soon as that is done presently their followes the same effect as in gun-powder whose composition is the same of Sulphur and Nitre a fight a rapture a noise a violent casting forth of the matter For thence it is that a viscous flaming matter is cast forth which presently inflames whatsoever it touches that is apt to flame and smiting into the earth it turnes to a stone and being taken out after a time is called a thunder-bolt XXXVI Flying sparks are a sulphury fume scattered into many small parts and kindled It is seldome seen as likewise those that follow XXXVII Ignis fatuus is a fat and viscous fume which by reason of its grossenesse doth not elevate it selfe far from the earth and being kindled straggles here and there leading travellers sometimes out of their way and into danger XXXVIII A torch is a fume like it but thin and therefore elevated upwards which being kindled burnes a while like a candle or lamp XXXIX Ignis lambens is a fat exhalation coming from a living body heated with motion and kindled at its head or near about It sometimes befalls men and horses vehemently breathing after running that the ardent vapours sent forth are turned into flames Of appearing Meteors Appearing Meteors are the images of things in clouds variously expressed by the incident light of which sort there are observed seven Chasma Halo Parelius Paraselene Rods Colours the Rainbow XL Chasma a pit is the hollowness of a cloud making shew of a great hole It it by reason of a shadow in the midst of a cloud the extremities whereof are enlightned You may see the like almost in the night by a candle on a wall which hath any hollownesse in it though it be whitish XLI Halo a floor is a luminous circle when the vapours underneath the sun or moon are illustrated with the rayes of the luminary You may see the same by night in a bath or any other vaporous place about a burning candle It is oftest seen under the moon because the sun with his stronger rayes either penetrates or dissipates the cloud XLII Parelius a false sun is the representation of the