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Show Le&. I. The (aufes of Mixture. Union, is when they touch in a Plain. As in the Cry/fals and Shoot- ines of all Salts, and other like Bodies. For if we purfue their di< ded and {ubdivided parts, with our eye, as far as wecan 5 they ftill terminate, on everyfide, in Plains. Wherefore ,_ tis intelligible, That C HA Pi their very Atomes doallo terminate, and therefore touch, in Plain, Ofthe C AUSES of Mixture. Concentration, is when two, or more Afomes touch by Reception — 9 and Intrufion of one into another: which is the clofeft, and firmeft ” “Mixture of alls as inany fixed unodorable, or wntaftable Body: the Atomes offach Bodies, being not able to make any Smell or Tafte, unlef they were firlt diffolved; that 1s to fay, wnpin'd one from ae Hence, Sixthly, we underftand, howin fome cafes, there feemeth to be a Penetration of Bodies; and in what Senfe it may be admitted: 27x. if we will mean no more by Pexetration, but Intrufion. Forthe Intrufion of one Atone into the Concave or hole of another, isa hind of Penetration ; whereby they take up lefs room in the mixed Body, then they would do by any other way of Contaé. As anaked knife and its{heath, take upalmoft double room,to what they do, when the knife is fheathed. Whence we mayaffign the reajon, Why many Liquors being mixed; take up lefs room orfpace, then they did apart; as the Ingenious Mr. Hook, hath madeit to appear by Experiment, that they do. _I fay the plainreafon hereof, orat leaft one reafon, is the Intruffon of many of their Atomes into one ancther. Which yet isnota Pevetration of BodiesftriGly fo called. 13. §. Seventhly, If all that Nature maketh, be but Mixture ; and Ch. 3. $+ a}] this Mixture be but Conta ‘tis then evident, That Natural and. Ch.3.$.14. Ariificial Mixture, are the fame. And all thofe seeming Jubtilties whereby Philofophers have gone about to diftinguifh them; have been but fo many Scarcrows to affright Mex from the Iv#itation of Nature. j , 19. §. Eighthly, Henceit follows, That Art it felf may go far in doing what Naturedoth. And whocan fay, how far? For we have nothing to Make; but only to mix thofe Materials, which are already made to our hands, Even’ Nature herfelf, as hath been faid, Maketh nothing xew 5 but only ~ixeth all things. So far, therefore, $F as we can govern Mixture, we may do what Natere doth. 20. §.. Which that we mayftill the better underftand 5 let us before, and in the next place, fee the Canfes of Mixture. For fince 13. Natural and Artificial Mixture are the fame 5 the immediate Caufés of both, are and muft be the fame. lV. tal Canfes of MO W all the Caujés of Mizxture we can conceiveof, muft, I think, be reduced to thefefix in general 5 viz. Congruity, Weight, Compreffion, Solution, DiSeftion, and Agitation. I. §. Congruity, or aptitudeand refpondence betwixt the Sizes and Figares of Parts to be mixed : whereby Bodies may be truly called the Inftrumenown Mixture, As when a Plein anfwers toa Plain, a Square to a Square, a Convex toa Concave, or a Lefs toa Greater or an Equal, &c. according to which Refpondencies in the parts of Bodies, they are more orlefs eafily wingleable. 2. §. Weight, by means whereofall Flvid Bodies, upon fuppofi- tion of theCongruity of their parts, mult nnavoidably mizgle. 3. §. Compreffion 5 which either by the Air, or any other Body, added to Weight, mutt, in fome degree, further Mixture. Becaufe, that Weight it{elf, is but Preffion. Forfurther Proof ofall the id CanJes, Imade this Experiment ; Let Oyle of Avifeeds, and Oy! of Vitriol be put apart into the Receiver of an Air-Pump. And, having exhanfted it ofthe Air, let the two faid Oyls be then affufed one upon the other. Whereupon, Firft, It is vifible, that they here mix and coagulate to- gether; that is, their parts are wedged and intruded one into another , without the nfial compreffion of the Air; for that is exhauffed, and therefore only by the Coxgruity of their receiving and intruding parts 5 and by their Weight ; by which alone they are fo compreffed, as to make that Intrafion, Secondly, It isalfoevident, That although they do Cos agulate; yet not altogether fo much, as when poured togetherin the {ame manner, and quantity, in the opex Air. Wherefore, Comprelfion, whether madeby the Air, or any thing elfe, as it doth further the Diffolution of fome Bodies, fo the Mixture of others, and the greater the Compreffiov, the more. 4. §. Solution; For all Bodies mix beft, in Forwa fluida. that for two reafons. And Firf?, Becaufe the parts of a Body are not then inaflate of Uxion, but of Separation ; and therefore, in a more capa- bleféate, fortheir Mixture and Union with the parts of another Body. Secondly, becaufe then they are alfo in a ftate of Motion, moreorlefs5 and therefore, ina continual tendency towards Mixture; all Mixture being made by Motion. Whetefore all Generations; and moft perfee Mixturesin Nature, are made by Fluids; whether Avimal, Vegetable, or Mineral. Whichis alfo agreeable to the Doéfrine of the Honotirable Mr. Boyle, in his Excellent Treatife of the Nature and Vertues of Gems. And it is well known, That Bodies are ordinarily petrified, or Stones made, out of Water.That isyout ofpetrifying parts diflolved per minimd in Water,as both their Menfirunm and their Vehicle. Wherefore, if wé will talk of waking Gold; it mutt not be by the Philofophers Stove, but by the Philofophers Liquor. §3§; Dis |