of these you will finde your Nose invaded with a very strong smell of Urine, and perhaps too your Eyes forc'd to water by the same subtle and piercing Body that produces the stink; both these effects proceeding from hence, that by the Alcalizate Salt, the Sea Salt that enter'd the composition of the _Sal Armoniack_ is mortify'd and made more fixt, and thereby a divorce is made between it and the volatile Urinous Salt, which being at once set at liberty, and put into motion, begins presently to fly away, and to offend the Nostrils and Eyes it meets with by the way. And if the operation of these Salts be in convenient Glasses promoted by warmth, though but by that of a Bath, the ascending Steams may easily be caught and reduc'd into a penetrant Spirit, abounding with a Salt, which I have sometimes found to be separable in a Crystalline Form. I might add to these Instances, that whereas Sublimate, consisting, as you know, of Salts & Quicksilver combin'd and carried up together by Heat, may be Sublim'd, I know not how often, by a like degree of Fire, without suffering any divorce of the component Bodies, the Mercury may be easily sever'd from the adhering Salts, if the Sublimate be distill'd from Salt of Tartar, Quick Lime, or such Alcalizate Bodies. But I will rather observe to you, _Eleutherius_, what divers ingenious men have thought somewhat strange; that by such an Additament that seems but only to promote the Separation, there may be easily obtain'd from a Concrete that by the Fire alone is easily divisible into all the Elements that Vegetables are suppos'd to consist of, such a similar Substance as differs in many respects from them all, and consequently has by many of the most Intelligent Chymists been denied to be contain'd in the mixt Body. For I know a way, and have practis'd it, whereby common Tartar, without the addition of any thing that is not perfectly a Mineral except Salt-petre, may by one Distillation in an Earthen Retort be made to afford good store of real Salt, readily dissoluble in water, which I found to be neither acid, nor of the smell of Tartar, and to be almost as volatile as Spirit of Wine it self, and to be indeed of so differing a Nature from all that is wont to be separated by Fire from Tartar, that divers Learned Men, with whom I discours'd of it, could hardly be brought to beleeve, that so fugitive a Salt could be afforded by Tartar, till I assur'd it them upon my own Knowledge. And if I did not think you apt to suspect me to be rather too backward than too forward to credit or affirm unlikely things, I could convince you by what I have yet lying by me of that anomalous Salt. [Footnote 4: Lib. 1. Observat. Cap. 6.]