those which I intimated in the praeamble of this present Experiment; For besides, that ’tis very allowable for a Writer to repeat an Experiment which he invented not, in case he improve it; And besides that many Experiments familiar to Chymists are unknown to the generality of Learned Men, who either never read Chymical processes, or never understood their meaning, or never durst believe them; besides these things, I say, I shall represent, That, as to the few Experiments I have borrowed from the Chymists, if they be very Vulgar, ’twould perhaps be difficult to ascribe each of them its own Author, and ’tis more than the generality of Chymists themselves can do:  and if they be not of very known and familiar practise among them, unless the Authors wherein I found them had given me cause to believe, themselves had try’d them, I know not why I might not set them down, as a part of the Phaenomena of Colours which I present you; Many things unanimously enough deliver’d as matters of fact by (I know not how many Chymical Writers) being not to be rely’d on, upon the single Authority of such Authors:  For Instance, as some Spagyrists deliver (perhaps amongst several deceitful processes) that Saccarum Saturni with Spirit of Turpentine will afford a Balsom, so Beguinus and many more tell us, that the same Concrete (Saccarum Saturni) will yield an incomparably fragrant Spirit, and a pretty Quantity of two several Oyles, and yet since many have complain’d, as well as I have done, that they could find no such odoriferous, but rather an ill-sented Liquor, and scarce any oyl in their Distillation of that sweet Vitriol, a wary person would as little build any thing on what they say of the former Experiment, as upon what they averr of the later, and therefore I scrupled not to mention this Red Balsom of which I have not seen any, (but what I made) among my other experiments about redness.

Annot.  II.

We have sometimes had the Curiosity to try what Colours Minerals, as Tinglass, Antimony, Spelter, &c. would yield in several Menstruums, nor have we forborn to try the Colours of stones, of which that famous one, (which Helmont calls Paracelsus’s Ludus) though it be digg’d out of the Earth and seem a true stone, has afforded in Menstruums capable to dissolve so solid a stone, sometimes a Yellowish, sometimes a Red solution of both which I can show you.  But though I have from Minerals obtain’d with several Menstruums very differing Colours, and some such as perhaps you would be surpriz’d to see drawn from such Bodies:  yet I must now pass by the particulars, being desirous to put an End to this Treatise, before I put an end to your Patience and my own.

Annotation III.