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version 1.26, 2003/05/13 10:32:05 version 1.27, 2003/05/14 10:34:20
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 <s>The effect of the tryal was this, that <lb/>till a pretty quantity of Air had been <lb/>drawn out, the Water dropp'd freely out <lb/>at the lower end of the lower leg of the <lb/><emph type="italics"/>Siphon,<emph.end type="italics"/> as if the Experiment had been <lb/>performed in the free Air. </s> <s>The effect of the tryal was this, that <lb/>till a pretty quantity of Air had been <lb/>drawn out, the Water dropp'd freely out <lb/>at the lower end of the lower leg of the <lb/><emph type="italics"/>Siphon,<emph.end type="italics"/> as if the Experiment had been <lb/>performed in the free Air. </s>
  
 <s>But afterwards, <lb/>the Bubbles (as had been apprehended) <lb/>began to di&longs;clo&longs;e them&longs;elves in the Wa&shy;<lb/>ter, and a&longs;cending to the top of the <emph type="italics"/>Si&shy;<lb/>phon,<emph.end type="italics"/> imbodyed them&longs;elves there into <lb/>one, which was augmented little by little <lb/>by the ri&longs;ing of other bubbles that from <lb/>time to time broke into it, but much <pb pagenum="278"/>fir&longs;t we thought might be &longs;ome &longs;tain up&shy;<lb/>on the Gla&longs;s; but after, finding it to <lb/>be in divers Qualities like the Oyl, <lb/>and Salt of the Concrete we were Di&shy;<lb/>&longs;tilling, we began to &longs;u&longs;pect that the <lb/>mo&longs;t &longs;ubtle and fugitive parts of the im&shy;<lb/>petuou&longs;ly a&longs;cending Steams, had pene&shy;<lb/>trated the &longs;ub&longs;tance (as they &longs;peak) of <lb/>the Gla&longs;s, and by the cold of the am&shy;<lb/>bient Air were conden&longs;'d on the &longs;ur&shy;<lb/>face of it. </s> <s>But afterwards, <lb/>the Bubbles (as had been apprehended) <lb/>began to di&longs;clo&longs;e them&longs;elves in the Wa&shy;<lb/>ter, and a&longs;cending to the top of the <emph type="italics"/>Si&shy;<lb/>phon,<emph.end type="italics"/> imbodyed them&longs;elves there into <lb/>one, which was augmented little by little <lb/>by the ri&longs;ing of other bubbles that from <lb/>time to time broke into it, but much <pb pagenum="265"/> more by its own dilatation, which en-<lb/>crea&longs;'d proportionably to the ex&longs;uction<lb/> that was made of the Air out of the Re-<lb/>ceiver.</s>
  
  <s>So that at length the Water in<lb/> the &longs;horter Leg of the <emph type="italics"/>Siphon<emph.end type="italics"/>was re-<lb/>duc'd partly by the extraction of the am-<lb/>bient Air, and partly by the expan&longs;ion<lb/> of the great Bubble at the upper part of<lb/> the <emph type="italics"/>Siphon<emph.end type="italics"/>, to be but about a Foot high,<lb/> if &longs;o much; wherby it came to pa&longs;s,<lb/> that the cour&longs;e of the Water in the <emph type="italics"/>Si-<lb/>phon<emph.end type="italics"/> was interrupted, and that which re-<lb/>main'd in the longer Leg of it, continu'd<lb/> &longs;u&longs;pended there without dropping any<lb/> longer.</s>
  
  <s>But upon the turning of the<lb/> Stop-cock, the outward Air (being t<lb/> into the Receiver) got into the <emph type="italics"/>Siphon<emph.end type="italics"/> by<lb/> the little hole at which the Water former-<lb/>ly dropt out;  and traver&longs;ing all the in-<lb/>cumbent Cylinder of Water, in the form<lb/> of Bubbles, joyn'd it &longs;elf with that Air<lb/> that before po&longs;longs;e&longs;longs;'d the top of the <emph type="italics"/>Si-<lb/>phon<emph.end type="italics"/>.</s></p>
  
  <p type="main"><s>To prevent the inconveniences ari&longs;ing<lb/> from the&longs;e Bubbles, two Gla&longs;s Pipes, like <lb/> the former; were &longs;o placed; as to termi-<lb/>nate together in the mid&longs;t of the Belly of<lb/> a Gla&longs;s Viol, into who&longs;e Neck they<lb/> were carefully fa&longs;tned with Cement; and<pb pagenum="266"/> then both the Viols and the Pipes being<lb/> (which was not the not done without difficulty)<lb/> totally fill'd with Water, the <emph type="italics"/>Siphon<emph.end type="italics"/><lb/> de&longs;crib'd in the fifth Figure, was plac'd<lb/> with its &longs;horter Leg in the Gla&longs;s of Wa-<lb/>ter, as formerly; and the Experiment be-<lb/>ing pro&longs;ecuted after the &longs;ame manner,<lb/> much more Air then formerly was drawn<lb/> out, before the Bubbles di&longs;closing them-<lb/>&longs;elves in the Water were able to di&longs;turb<lb/> the Experiment; becau&longs;e that in the ca-<lb/>pacity of the Viol there was room enough for them to &longs;tretch them&longs;elves, without<lb/> depre&longs;&longs;ing the Water below the ends of<lb/> the Pipes; and, during this time, the<lb/> Water continued to drop out of the pro-<lb/>pending Leg of the <emph type="italics"/>Siphon<emph.end type="italics"/>.</s>
  
  <s>But at<lb/> length the Receiverbeing very much em-<lb/>pty'd, the pa&longs;&longs;age of the Water through<lb/> the <emph type="italics"/>Siphon<emph.end type="italics"/>cea&longs;'d, the upper ends of the<lb/> Pipes beginning to appear a little above<lb/> the remaining Water in the Viol, who&longs;e<lb/> dilated Air appear'd likewi&longs;e to pre&longs;s<lb/> down the Water in the Pipes, and fill the<lb/> upper part of them.</s>
  
  <s>And hereby the con-<lb/>tinuity of the Water, and &longs;o the Expe-<lb/>riment it &longs;elf being interrupted, we were<lb/> invited to let in the air again, which, ac-<lb/>cording to its various proportions of<pb pagenum="267"/> pre&longs;&longs;ure to that of the Air in the Viol<lb/> and the Pipes, did for a good while exhi-<lb/>bite a plea&longs;ing variety of <emph type="italics"/>Phaenomena<emph.end type="italics"/>,<lb/> which we have not now the lei&longs;ure to re-<lb/>cite.</s>
  
  <s>And though upon the whole mat-<lb/>ter there &longs;eem'd little or no cau&longs;e to<lb/> doubt, but that, if the Bubbles had not<lb/> di&longs;turb'd the Experiment, it would mani-<lb/>fe&longs;tly enough have appear'd that the<lb/> cour&longs;e of Water through <emph type="italics"/>Siphons<emph.end type="italics"/> de-<lb/>pends upon the pre&longs;&longs;ure of the Air: yet<lb/> we re&longs;olv'd, at our next lei&longs;ure and con-<lb/>veniency, to try the Experiment again,<lb/> with a quantity of Water before freed<lb/> from Bubbles by the help of the &longs;ame<lb/> Engine.</s></p>
  
  <p type="main"><s>This occa&longs;ion I have had to take notice<lb/> of <emph type="italics"/>Siphons<emph.end type="italics"/>, puts me in minde of an odde<lb/> kinde of <emph type="italics"/>Siphon<emph.end type="italics"/> that I cau&longs;'d to be made<lb/> a pretty while ago; and which has been<lb/> &longs;ince, by an Ingenious Man of Your ac-<lb/>quaintance, communicated to divers o-<lb/>thers.</s>
  
  <s>This occa&longs;ion was this, An emi-<lb/>nent Mathematician told me one day, that<lb/> &longs;ome inqui&longs;itive French Men (who&longs;e<lb/> Names I know not) had ob&longs;erv'd, That,<lb/> in ca&longs;e one end of a flender and perforated<lb/> Pipe of Gla&longs;s be dipt in Water, the Li-<pb pagenum="268"/>quor will a&longs;cend to &longs;ome height in the<lb/>Pipe, though held perpendicular to the<lb/>plain of the Water.</s>
  
  <s>And, to &longs;atisfie me<lb/> that he mi&longs;-related not hte Experiment, he &longs;oon after brought two or three<lb/>&longs;mall Pipes of Gla&longs;s, which gave me the<lb/> opportunity of trying it: though I had<lb/>the le&longs;s rea&longs;on to di&longs;tru&longs;t it, becau&longs;e I re-<lb/>member I had often in the long and flen-<lb/>der Pipes of &longs;ome Weather Gla&longs;&longs;as,<lb/> which I had cau&longs;'d to be made after a<lb/>&longs;omewhat peculiar fa&longs;hion, taken notice<lb/> of the like a&longs;cen&longs;ion of the Liquor,<lb/> though (pre&longs;uming it might be ca&longs;ual) I<lb/> had made but litllereflection upon it.</s>
  
  <s>But<lb/> after this tryal, beginning to &longs;uppo&longs;e, that<lb/> though the Water in the&longs;e Pipes that<lb/> were brought me, ri&longs;e not above a quar-<lb/>ter of an Inch, (if near &longs;o high) yet, if<lb/> the Pipes were made flender enough, the<lb/> water might ri&longs;e to a very much greater<lb/> height; I cau&longs;'d &longs;everal of them to be, by<lb/> a dexterous Hand, drawn out at the flame<lb/> of a Lamp, in one of which that was<lb/> almo&longs;t incredibly flender, we found that<lb/> the Water as&longs;ended (as it were of it &longs;elf)<lb/> five Inches by mea&longs;ure, to the no &longs;mall<lb/> wonder of &longs;ome famous Mathematicians,<lb/> who were Spectators of &longs;ome of the&longs;e<pb pagenum="269"/>Experiments.</s>
  
  <s>And this height the Wa-<lb/>ter reach'd to, though the Pipe were held<lb/> in as erected a po&longs;ture as we could: For if<lb/> it were inclin'd, the Water would fill a<lb/> greater part of it, though not ri&longs;e higher<lb/> in it.</s>
  
  <s>And we al&longs;o found, that when the<lb/> in&longs;ide of the Pipe was wetted before-<lb/>hand, the Water would ri&longs;e much better<lb/> then otherways: But we cau&longs;'d not all our flender Pipes to be made &longs;traight, but<lb/> &longs;ome of them crooked, like <emph type="italics"/>Siphons<emph.end type="italics"/>: And<lb/> having immer&longs;'d the &longs;horter Leg of one<lb/> of the&longs;e into a Gla&longs;s that held &longs;ome fair<lb/> Water, we found, as we expected, that<lb/> the Water ari&longs;ing to the top of the <emph type="italics"/>Si-<lb/>phon<emph.end type="italics"/>, though that were high enough, did of it &longs;elf run down the longer Leg, and <lb/> continue running like an ordinary <emph type="italics"/>Siphon<emph.end type="italics"/>.<lb/></s>
  
  <s>The cau&longs;e of this a&longs;cen&longs;ion of the Wa-<lb/>ter, appear'd to all that were pre&longs;ent &longs;o<lb/> difficult, that I mu&longs;t not &longs;tay to enumerate<lb/> the various Conjectures that were made<lb/> at it, much le&longs;s to examine them; e&longs;pe-<lb/>cially, having nothing but bare Conje-<lb/>ctures to &longs;ub&longs;titute in the room of tho&longs;e<lb/> I do not approve.</s>
  
  <s>We try'd indeed, by <lb/> conveying a very flender Pipe and a &longs;mall<lb/> Ve&longs;&longs;el of Water into our Engine, whe-<lb/>ther or no the Ex&longs;uction of the ambient<pb pagenum="270"/> Air would a&longs;&longs;i&longs;t us to finde the cau&longs;e of<lb/> the a&longs;cen&longs;ion we have been &longs;peaking of:<lb/> But though we imploy'd red Wine in-<lb/>&longs;tead of Water, yet we could fearce cer-<lb/>tainly perceive thorow &longs;o much Gla&longs;s, as<lb/> was interpo&longs;'d betwixt our Eyes and the<lb/>Liquor, what happen'd in a Pipe &longs;o flen-<lb/>der, that the redne&longs;s of the Wine was<lb/> &longs;carce &longs;en&longs;ible in it.</s>
  
  <s>But as far as we could<lb/>di&longs;cern, there happen'd no great altera-<lb/>tion to the Liquor: which &longs;eem'd the le&longs;s<lb/> &longs;trange, becau&longs;e the Spring of that Air<lb/> that might depre&longs;s the Water in the Pipe, was equally debilitated with that which<lb/> remain'd to pre&longs;s upon the &longs;urface of the<lb/> Water in the little Gla&longs;s.</s>
  
  <s>Wherefore, in favor of his Ingenious Conjecture who<lb/> a&longs;crib'd the <emph type="italics"/>Phaenomenon<emph.end type="italics"/>, under con&longs;ide-<lb/>ration to the greater pre&longs;&longs;ure made upon<lb/> the Water by the Air without the Pipe,<lb/> then by that within it, (where &longs;o much of<lb/> the Water (con&longs;i&longs;ting perhaps of Corpu-<lb/>&longs;cles more pliant to the internal &longs;urfaces of<lb/> the Air) was contiguous to the &longs;ides) it<lb/> was &longs;hown, that in ca&longs;e the little Gla&longs;s<lb/> Ve&longs;&longs;el that held the Water, of which a<lb/> part a&longs;cended into the flender Pipe, were<lb/> &longs;o clo&longs;'d, that a Man might with his mouth<lb/> &longs;uck the Air out of it, the Water would <pb pagenum="271"/> immediately &longs;ub&longs;ide in the &longs;mall Pipe.</s>
  
  <s>And this would indeed infer, that it a&longs;-<lb/>cended before onely by the pre&longs;&longs;ure of<lb/> the incumbent Air: But that it may<lb/> (how ju&longs;tly I know not) be objected,<lb/> that preadventure this would not hap-<lb/>pen, in ca&longs;e the upper ende of the Pipe<lb/> were in a <emph type="italics"/>Vacuum<emph.end type="italics"/>: And that 'tis very<lb/> probable the Water may &longs;ub&longs;ide, not<lb/> becau&longs;e the pre&longs;&longs;ure of the internal Air<lb/> is taken off by Ex&longs;uction, but by rea&longs;on<lb/> of the Spring of the external Air,<lb/> which impels the Water it findes in its<lb/> way to the Cavity de&longs;erted by the<lb/> other Air, and would as well impell<lb/> the &longs;ame Water upwards, as make it<lb/> &longs;ub&longs;ide, if it were not now lei&longs;ure to exa-<lb/>mine any further this Matter, I &longs;hall<lb/> onely minde Your Lord&longs;hip, that if<lb/> You will pro&longs;ecute this Speculation,<lb/> it will be pertinent to finde out likewi&longs;e,<lb/> Why the &longs;urface of Water /as is manife&longs;t<lb/> in Pipes) u&longs;es to be concave, being de-<lb/>pre&longs;&longs;'d in the middle, and higher on eve-<lb/>ry side? and Why in Quick-&longs;ilver on the<lb/> contrary, not onely the &longs;urface is wont <pb pagenum="272"/> to be very convex, or &longs;welling, in the<lb/> middle; but if you dip the end of a flen-<lb/>der Pipe in it, the &longs;urface of the Li-<lb/>quor (as 'tis call'd) will be lower within<lb/> the Pipe, then without.</s>
  
  <s>Which <emph type="italics"/>Phaeno-<lb/>mena<emph.end type="italics"/>, whether, and how far, they may<lb/> be deduc'd from the Figure of the Mer-<lb/>curial Corpu&longs;cles, and the Shape of the<lb/> Springy Particles of the Air, I willingly<lb/> leave to be con&longs;ider'd.</s></p>
  
  <p type="main"><s><arrow.to.target n="marg441"></arrow.to.target>SEveral ways we have met with pro-<lb/>po&longs;'d, partly by the excellent <emph type="italics"/>Galileo<emph.end type="italics"/>,<lb/> and partly by other ingenious Writers,<lb/> to manife&longs;t that the Air is not devoid of<lb/> weight; &longs;ome of the&longs;e, require the previ-<lb/>ous ab&longs;ence of the Air to be weighed;<lb/> and others, the violent conden&longs;ation of it.<lb/></s>
  
  <s>But if we could lift a pair of Scales above<lb/> the Atmo&longs;phere, or place them in a <emph type="italics"/>Va-<lb/>cuum<emph.end type="italics"/>, we might there weigh a parcel of<lb/> Air it &longs;elf, as here we do other Bodies in<lb/> the Air, becau&longs;e it would there be heavi-<lb/>er then that which &longs;urrounds it, as are<lb/>gro&longs;&longs;er Bodies we commonly weigh, then<lb/> the medium or ambient Air.</s>
  
  <s>Where-<lb/>fore, though we have above declin'd to<lb/> affirm, that our Receiver, when empty-<pb pagenum="273"/>ed, de&longs;erves the name of a true <emph type="italics"/>Vacuum<emph.end type="italics"/>,<lb/> and though we cannot yet perfectly free<lb/> it from Air it &longs;elf, yet we thought fit to<lb/><lb/> try how far the Air would manife&longs;t its<lb/> gravity in &longs;o thin a medium, as we could<lb/> make in our Receiver, by evacuating it.<lb/></s>
  
  <s>We cau&longs;'d then to be blown at the Flame<lb/> of a Lamp, a Gla&longs;s-bubble of about<lb/> the bigne&longs;s of a small Hen egge, and of<lb/> an Oval form, &longs;ave that at one end there<lb/> was drawn out an exceeding flender Pipe,<lb/> that the Bubble might be &longs;eal'd up, with<lb/> as little rarifaction as might be, of the<lb/> Air included in the great or ovall Cavi-<lb/>ty of it.</s>
  
  <s>This Gla&longs;s being &longs;eal'd, was fa-<lb/>&longs;tened to one of the Scales of the exact<lb/> pair of Ballances formerly mention'd;<lb/> and being counterpoi&longs;'d with a weight of<lb/> Lead, was convey'd into the Receiver,<lb/> and clo&longs;'d up in it.</s>
  
  <s>The Beam appearing<lb/> to continue Horizontal, the Pump was &longs;et<lb/> awork, and there &longs;carce pa&longs;t above two<lb/> or three Ex&longs;uctions of the Air, before<lb/> the Ballance lo&longs;t its <emph type="italics"/>Aequilibrium<emph.end type="italics"/>, and<lb/> began to incline to that &longs;ide on which the Bubble was; which, as the Air was<lb/> further and further drawn out, did mani-<lb/>fe&longs;tly more and more preponderate, till<lb/> he that pump'd began to grow weary of<pb pagenum="274"/> his Imployment: after which the aire be-<lb/>ing lea&longs;urely let in againe, the &longs;cales by<lb/> degrees returned to their former <emph type="italics"/>Aequili-<lb/>brium<emph.end type="italics"/>.</s>
  
  <s>After that we tooke them out, and<lb/> ca&longs;ting into that &longs;cale to which the lead belong'd three quarters of a grain, we<lb/> convey'd the ballance into the Recei-<lb/>ver, which being clo&longs;ed up, and exhau-<lb/>&longs;ted as before, we ob&longs;erv'd, that as the<lb/> aire was drawne out more and more, &longs;o the gla&longs;&longs;e bubble came neerer and neer-<lb/>er to an <emph type="italics"/>Aequilibrium<emph.end type="italics"/> with the other<lb/> weight, till at length the beame was<lb/> drawne to hang horizontall; which (as<lb/> we had found by another tryall) wee<lb/> could not bring it to do, when a quar-<lb/>ter of a Graine more was added to<lb/> the &longs;cale, to which the lead belong'd:<lb/> though it &longs;eem'd que&longs;tionle&longs;&longs;e, that if<lb/> wee could have perfectly empty'd the Receiver of the contain'd aire, that in-<lb/>cluded, in the bubble would have weigh-<lb/>ed above a grain, notwith&longs;tanding its<lb/> having been probably &longs;omewhat Rari-<lb/>fy'd by the flame by the help of which,<lb/> the bubble was &longs;eald up.</s>
  
  <s>Let us adde,<lb/> that on the regre&longs;&longs;e of the excluded<lb/> air, the Lead, and the weight ca&longs;t into the <pb pagenum="275"/>&longs;ame &longs;cale, did againe very much pre-<lb/>ponderate.</s></p>
  
  <p type="margin"><s><margin.target id="marg441"></margin.target><emph type="italics"/>Experi-<lb/>ment 36.<emph.end type="italics"/></s></p>
  
  <p type="main"><s>We likewi&longs;e convey'd into the Re-<lb/>ceiver, the &longs;ame bubble, open'd at<lb/> the end of the flender pipe above men-<lb/>tioned, but having drawne out the aire,<lb/> after the accu&longs;tomed manner, we found<lb/> not as before, the bubble to out-weigh<lb/> the oppo&longs;ite lead, &longs;o that by the help<lb/> of our Engine, we can weigh the Aire,<lb/> as we weigh other Bodies, in its na-<lb/>turall or ordinary con&longs;i&longs;tence, without<lb/> at all conden&longs;ing it: Nay, which is re-<lb/>markable, having convey'd a Lamb's<lb/> bladder about halfe full of Aire into the<lb/> Receiver, wee ob&longs;erved, that though<lb/> upon the drawing out of the ambient<lb/>aire the impri&longs;oned Air &longs;o expended<lb/> it &longs;elf, as to di&longs;tend the Bladder &longs;o, as to<lb/> &longs;eem ready to break it, yet this rarified<lb/> Air did manife&longs;tly depre&longs;s the Scale<lb/> whereunto it was annexed.</s></p>
  
  <p><s>Another thing, we mu&longs;t not forget to<lb/> mention, that happend to us, whil'&longs;t we were<lb/> making tryals concerning the weight of the<lb/> Air; namely, That having once cau&longs;'d the<pb pagenum="276"/> Pump to be &longs;omewhat ob&longs;tinately ply'd,<lb/> to di&longs;cover the better what may be ex-<lb/>pected from the thinne&longs;s of the medium<lb/> in this Experiment; the Impri&longs;on'd Air<lb/> broke its brittle Pri&longs;on, and throwing the<lb/> greate&longs;t part of it again&longs;t the &longs;ide of the<lb/> Receiver, da&longs;h'd it again&longs;t that thick Gla&longs;s<lb/> into a multitude of pieces.</s>
  
  <s>Which Acci-<lb/>dent I mention, partly that it may con-<lb/>firm what we deliver'd in our Reflections,<lb/> upon the fir&longs;t Experiment, where we con-<lb/>&longs;ider'd what would probably be done by<lb/> the Spring of Air Impri&longs;on'd in &longs;uch<lb/> Gla&longs;&longs;es, in ca&longs;e the ballancing pre&longs;&longs;ure of<lb/> the ambient Air were withdrawn; and<lb/> partly, that we may thence di&longs;cern of how<lb/> clo&longs;e a Texture Gla&longs;s is, &longs;ince &longs;o very<lb/> thin a film of Gla&longs;s (if I may &longs;o call it)<lb/> prov'd &longs;o impervious to the Air, that it<lb/> could not get away through the Pores,<lb/> but was forc'd to break the gla&longs;s in pieces<lb/> to free it &longs;elf; and this, notwith&longs;tanding<lb/> the time and advantage it had to try to<lb/> get out at the Pores.</s>
  
  <s>And this I mention,<lb/> that neitherour Experiments, nor tho&longs;e<lb/> of divers Learned Men, might receive<lb/> any prejudice from an Experiment which<lb/> I happen'd to make divers years ago, and,<lb/> which having been &longs;o much taken notice<pb pagenum="277"/> of by curious Men, may be drawn to<lb/> countenance their erroneous Opinion, who<lb/> would fain per&longs;wade us, That Gla&longs;s is<lb/> penetrable by Air properly &longs;o called.</s>
  
  <s>Our<lb/> Experiment was briefly this: We were<lb/> di&longs;tilling a certain &longs;ub&longs;tance, that much a-<lb/>bounded with &longs;ubtle Spirits and volatile<lb/> Salt, in a &longs;trong Earthen-ve&longs;&longs;el of an un-<lb/>u&longs;ual &longs;hape, to which was luted a large<lb/> Receiver, made of the cour&longs;er &longs;ort of<lb/> Gla&longs;s, (which the Trades-men are wont<lb/> to call Green-gla&longs;s) but in our ab&longs;ence,<lb/> the Fire, though it were to be very &longs;trong,<lb/> was by the negligence or mi&longs;take of tho&longs;e<lb/> we appointed to attend it, &longs;o exce&longs;&longs;ively<lb/> increa&longs;'d, that when we came back to the<lb/> Fornace we found the Spirituous and Sa-<lb/>line Corpu&longs;cles pour'd out (if I may &longs;o<lb/> call it) &longs;o hot, and &longs;o copiou&longs;ly into the<lb/> Receiver, that they made it all opacous,<lb/> and more likely to flie in pieces, then fit<lb/> to be touch'd.</s>
  
  <s>Yet, being curious to ob-<lb/>&longs;erve the effects of a Di&longs;tillation, pr&longs;e-<lb/>cuted with &longs;o inten&longs;e and unu&longs;ual degree<lb/> of heat, we ventur'd to come near, and<lb/> ob&longs;erv'd among other things, that on the<lb/> out-&longs;ide of the Receiver, at a great di-<lb/>&longs;tance from the juncture, there was &longs;etled<lb/> a round whiti&longs;h Spot or two, which at<pb pagenum="278"/>fir&longs;t we thought might be &longs;ome &longs;tain up&shy;<lb/>on the Gla&longs;s; but after, finding it to <lb/>be in divers Qualities like the Oyl, <lb/>and Salt of the Concrete we were Di&shy;<lb/>&longs;tilling, we began to &longs;u&longs;pect that the <lb/>mo&longs;t &longs;ubtle and fugitive parts of the im&shy;<lb/>petuou&longs;ly a&longs;cending Steams, had pene&shy;<lb/>trated the &longs;ub&longs;tance (as they &longs;peak) of <lb/>the Gla&longs;s, and by the cold of the am&shy;<lb/>bient Air were conden&longs;'d on the &longs;ur&shy;<lb/>face of it. </s>
  
 <s>And though we were ve&shy;<lb/>ry backward to credit this &longs;u&longs;pition, and <lb/>therefore call'd in an Ingenious Per&longs;on <lb/>or two, both to a&longs;&longs;i&longs;t us in the Ob&shy;<lb/>&longs;ervation, and have Witne&longs;s of its e&shy;<lb/>vent, we continued a while longer to <lb/>watch the e&longs;cape of &longs;uch unctuous Fumes, <lb/>and upon the whole matter unanimou&longs;ly <lb/>concluded, That all things con&longs;ider'd, <lb/>the &longs;ubtle parts of the di&longs;till'd matter <lb/>being violently agitated, by the exce&longs;&shy;<lb/>&longs;ive heat had pa&longs;&longs;'d through the Pores <lb/>of the Gla&longs;s, widen'd by the &longs;ame heat. <lb/></s> <s>And though we were ve&shy;<lb/>ry backward to credit this &longs;u&longs;pition, and <lb/>therefore call'd in an Ingenious Per&longs;on <lb/>or two, both to a&longs;&longs;i&longs;t us in the Ob&shy;<lb/>&longs;ervation, and have Witne&longs;s of its e&shy;<lb/>vent, we continued a while longer to <lb/>watch the e&longs;cape of &longs;uch unctuous Fumes, <lb/>and upon the whole matter unanimou&longs;ly <lb/>concluded, That all things con&longs;ider'd, <lb/>the &longs;ubtle parts of the di&longs;till'd matter <lb/>being violently agitated, by the exce&longs;&shy;<lb/>&longs;ive heat had pa&longs;&longs;'d through the Pores <lb/>of the Gla&longs;s, widen'd by the &longs;ame heat. <lb/></s>
  


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