4. When you have thus clarified it, you have two ways to preserve it all the year.
(1.) When it is cold, put it into a glass, and put so much oil on it as will cover it to the thickness of two fingers; the oil will swim at the top, and so keep the air from coming to putrify it: When you intend to use it, pour it into a porringer, and if any oil come out with it, you may easily scum it off with a spoon, and put the juice you use not into the glass again, it will quickly sink under the oil. This is the first way.
(2.) The second way is a little more difficult, and the juice of fruits is usually preserved this way. When you have clarified it, boil it over the fire, till (being cold) it be of the thickness of honey; This is most commonly used for diseases of the mouth, and is called Roba and Saba. And thus much for the first section, the second follows.
SECTION II.
The way of making and keeping all necessary Compounds.
CHAPTER I.
Of distilled Waters.
Hitherto we have spoken of medicines which consist in their own nature, which authors vulgarly call Simples, though sometimes improperly; for in truth, nothing is simple but pure elements; all things else are compounded of them. We come now to treat of the artificial medicines, in the form of which (because we must begin somewhere) we shall place distilled waters in which consider,
1. Waters are distilled of herbs, flowers, fruits, and roots.