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Being weary and almost blind with writing and reading so much to-day, I took boat at the Old Swan, and there up the river all alone as high as Putney almost, and then back again, all the way reading, and finishing Mr. Boyle's book of Colours, which is so chymical, that I can understand but little of it, but understand enough to see that he is a most excellent man.
To make Wormwood Cakes: Take one pound of double-refin'd sugar sifted; mix it with the whites of three or four eggs well beat; into this drop as much chymical oil of wormwood as you please. So drop them on paper; you may have some white, and some marble, with specks of colours, with the point of a pin; keep your colours severally in little gallipots.
Being weary and almost blind with writing and reading so much to-day, I took boat at the Old Swan, and there up the river all alone as high as Putney almost, and then back again, all the way reading, and finishing Mr. Boyle's book of Colours, which is so chymical, that I can understand but little of it, but understand enough to see that he is a most excellent man.
Now since the Chymical Oyls, by reason of their great prices are most of them adulterated, and very few of them right good, and that nothing hath been published on this matter, and to leave the buyers of them unexcusable, I shall here add briefly, yet sufficiently the ways to discover these Cheats. First for sweet-scented Chymical Oyls, viz. those of Cloves, Cinnamon and Sassaphras.
Not that his countrymen can be charged with being insensible of his excellencies, till other nations taught them to admire him; for, in 1718, he was chosen to succeed Le Mort in the professorship of chymistry; on which occasion he pronounced an oration, "De chemia errores suos expurgante," in which he treated that science with an elegance of style not often to be found in chymical writers, who seem generally to have affected, not only a barbarous, but unintelligible phrase, and to have, like the Pythagoreans of old, wrapt up their secrets in symbols and enigmatical expressions, either because they believed that mankind would reverence most what they least understood, or because they wrote not from benevolence, but vanity, and were desirous to be praised for their knowledge, though they could not prevail upon themselves to communicate it.
For being sollicitous to find out some ready wayes of discriminating the Tribes of Chymical Salts, I found that all those I thought fit to make Tryal of, would, if they were of a Lixiviate Nature, make with Sublimate dissolv'd in Fair Water an Orange Tawny Precipitate; whereas if they were of an Urinous Nature the Precipitate would be White and Milky.
Evelyn continued for some time in town; attending to his anatomical and chymical studies. Wilmot had completed his comedy. It had been favourably received by the manager; and was to be the second new piece brought forward. Turl, with equal perseverance, was pursuing his own plans: and, though I heard nothing more from Olivia, my heart was at ease.
The same also may be said of Compositions, much more of Chymical Medicines so much sophisticated, and of so much danger and hazard, if not well prepared, which he cannot discover till he hath seen the effect of them, unless it be such as he makes himself, nor those neither till he hath made some tryal of them.
Clerke and all her crew; and so to a private house, and sent for a side of pig, and eat it at an acquaintance of W. Hewer's, where there was some learned physic and chymical books, and among others, a natural "Herball" very fine.
But I think it needless to exemplifie here our Method by any other Instances, many such being to be met with in divers parts of this Treatise; but I will rather advertise you, that, by this way of examining Chymical Liquors, you may not onely in most Cases conclude Affirmatively, but in some Cases Negatively.
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