The Second Part.

of the Fire upon other Bodies, to Consider a little, what it does to those Mixtures which being Productions of the Art of Man, We best know the Composition of. You may then be pleas’d to take Notice that though Sope is made up by the Sope-Boylers of Oyle or Grease, and Salt, and Water Diligently Incorporated together, yet if You expose the Mass they Constitute to a Graduall Fire in a Retort, You shall then indeed make a Separation, but not of the same Substances that were United into Sope, but of others of a Distant and yet not an Elementary Nature, and especially of an Oyle very sharp and Fætid, and of a very Differing Quality from that which was Employ’d to make the Sope: fo if you Mingle in a due Proportion, Sal Armoniack with Quick-Lime, and Distill them by Degrees of Fire, You shall not Divide the Sal Armoniack from the Quick-Lime, though the one be a Volatile, and the other a Fix’d Substance, but that which will ascend will be a Spirit much more Fugitive, Penetrant, and stinking, then Sal Armoniack; and there will remain with the Quick-Lime all or very near all the Sea Salt that concurr’d to make up the Sal Armoniack; concerning which Sea Salt I shall, to satisfie You how well it was United to the Lime, informe You, that I have by making the Fire at length very Vehement, caus’d both the Ingredients to melt in the Retort it self into one Mass and such Masses are apt to Relent in the Moist Air. If it be here Objected, that these Instances are taken from factitious Concretes which are more Compounded then those which Nature produces; I shall reply, that besides that I have Mention’d them as much to Illustrate what I propos’d, as to prove it, it will be Difficult to Evince that Nature her self does not make Decompound Bodies, I mean mingle together such mixt Bodies as are already Compounded of Elementary, or rather of more simple ones. For Vitriol (for Instance) though I have sometimes taken it out of Minerall Earths, where Nature had without any assistance of Art prepar’d it to my Hand, is really, though Chymists are pleas’d to reckon it among Salts, a De-compounded Body Consisting (as I shall have occasion to declare anon) of a Terrestriall Substance, of a Metal, and also of at least one