substances so viscous, and tenacious, though soft, that it cannot be separated but by the means of fire. Nevertheless, these juices are not to be taken barely and purely, for that part which I have called Flegm, and which I have acknowledg'd for one of the five principles, of which every mixt body ought to be compos'd; for sometimes they them∣selves are compos'd of some or other of the other principles, which is easie to prove by the separation which the Artist may make thereof.
In which respect, I am not of the opinion of those that make the Juices, which issue out of Plants of themselves, to be Excrements. For then the most essential part of the Plant would be taken for an Excrement; and if it were an Excrement, it ought to be rejected. And yet we gather very carefully, purchase very dear, and use to good advan∣tage these pretended Excrements, as Myrrh, Bdellium, Tacamahacca, Storax, Benjamin, Natural-balsom, and several others which the Plants throw out of their barks, and which cannot but be accounted the best part of their composition. But now of those Juices that are to be prepar'd, and depend upon the skill of the Apothecary.
These Juices are drawn almost from all parts of the Plants; some by cutting the bark, to be afterwards dry'd in the Sun, as are the Juices of Scammony, Aloes and Pop∣py: Others by bruising and pressing. Thus as well Oyls as Aqueous Juices, are drawn from several Herbs and several Flowers; several Fruits and several Seeds. Such are the Juices of Carduus, Endive, Succorie, Burrage, Bugloss, &c. for Herbs. The Juices of Roses, Violets, Peach-flowers, red Poppies, &c. for Flowers. The Juices of Mul∣berries, Apples, Cherries, red Goose-berries, Barberries, &c. for Wine-Fruits. The Juices of Olives, Walnuts, Small-nuts, Almonds, Pine-apples, Pistaches, &c. for Oily Fruits. The Juices of the four greater cold Seeds, as also from the Seeds of Poppies, Danewort, Henbane, Marjoram, &c. for Oily Seeds. The other Juices are drawn by the addition of some Liquor; which cannot be avoided when the parts of the Plant are dry by accident, or that they have not moisture enough in themselves. Such are the Juices of Senna, Rhubarb, Angelica, Liquorice, Hellebore, &c. which are drawn forth by the addition of Liquor, and which being filter'd, are evaporated over a small fire; to the consistency of an Extract, of which they bear the name, and of which I shall speak in the Third Part of this Pharmacopoea.
Generally we bruise in a Marble-Mortar, or made of some hard-stone, with a Pestle of Wood, the Herbs, the Flowers, the Fruits, the Seeds, out of which we intend to draw the Juices, and then put them into a strong Cloth, or Bag, and squeeze out the Juice, either with your hands, or in a Press between two flat-pieces of Tin, Iron, or Wood. Then we let the Juice stand for some days, or else we expose it some days to the Sun; and then we pour out the clearest softly by inclination; and keep it so, or else strain it through Hippocrates breeches; or through some cloth-strainer, if the Juice be not clear enough, or if it be aqueous. The Juices of Herbs which are to be first made use of, or which ought to be clarify'd and boil'd with Sugar, or honey, or to be mingl'd and boil'd with Oyntments, and Emplaisters, have no need of all this care. But the Wine-Juices of Fruits must be well-clarify'd. For they must first be expos'd to the Sun, then strain'd, to the end that by that heat and digestion, and by that straining the gros∣ser parts of the Juice may be separated from the pure. These Juices are to be run through a bag, or rather through brown-paper, and they may be boil'd up with Sugar or honey, or be kept in bottles fill'd up within a small matter of the top; which vacancy must be fill'd with Oyl of sweet Almonds, to hinder the air from getting in and putrifying the Juice. However, after that, be careful to stop the bottles well, and to keep them in a place moderately cool, to make use of as occasion serves: At which time pour away the Oyl, and make use of the pure Juice, throwing away the feces. The Juices of Roses, and Peach-flowers, require the same care as the Wine-Juices.
Take notice that in drawing forth Acid red Juices, particularly that of Granates, you must do it in Glass-Vessels, or Gally-pots, or of glaz'd Earth, have your hands ve∣ry clean, and take an especial care that no Iron come near it, for fear of spoiling the colour. The Juice and also the Syrup of Kermes require the same care, for they lose their colour in Vessels of Iron or Copper.
To draw forth the Juice of certain viscous Plants, such as are Purslain, Burrage, Bugloss, and the like, the best way which I have found, is to put them whole into a Copper-Bason, tinn'd within, over a moderate Charcoal-fire, and there to keep them, stirring them from time to time, till some part of the Juice be got together at the bot∣tom of the Bason. Then separate this Juice by inclination; and set the Bason again up∣on the fire, and continue to keep it there and to stir the herbs, and to separate the Juice