Preparation of Compound Medicines - Oils (John Mirfield)

This is the next part of the preparations section from Mirfield's Breviarium Bartholomei, part 13, as found in Popular Medicine in the Thirteenth-Century England, by Tony Hunt.  This is my very rudimentary translation from Latin for the section on Oils.  Note, despite translation as "essential oils" at the start, these are essential oils as we think of them today.  Syrups, electuaries, pills, waters and powders are all covered in previous entries here.

​As with the previous translations, headers that are in parentheses are notes from Tony Hunt, while parentheses contained within the copy usually contain my own notes, whether it is clarification of a term or uncertainty of the translation.

(Oils)

Of Oils in General

Essential oils can be used for many purposes. For oils are made sometimes from flowers, sometimes from seeds, sometimes from fruits, sometimes from trees, sometimes from roots, and sometimes from other things, as will be shown below.

(Flowers)

Oil is made from the flowers in this way: one pound of flowers is taken, three pounds of olive oil are taken. Grind the flowers a little, then mix well with the oil. And then the flowers float together in a glass vase and put it on the rim in the hot sun. And so they were exposed to the sun for nine days. And this may be done a second time or a third time if you wish. Then the strain is reserved for use.

It can also be done in another way: take one pound of flowers, three pounds of oil. Let it boil for a long time in a double boiler, then strain through a cloth. And with the thrown flowers, add others if you wish, and do as before.

(Fruit)

Oil is made from the fruits as follows: grind them and let them be ground for several days. Then add the water, kneaded with your hands, and the oil. And let it boil for a very long time in a double vessel. And strain through a cloth. When it has cooled, collect what has been left behind.

(Seeds)

Oil is made from the seeds in this way: take a mustard seed or something else and put it in a yellow vessel and put a cloth over it and dig it in the moist earth and leave it there for nine days. Then grind it vigorously and put it in the chapel and strain it through a sieve and collect what comes out and reserve it.

But oil is made in a different way from the seeds and berries: reduce it to powder and make it boil in wine and strain. And after straining, add one pound of oil. And let it boil for the consumption of the wine and reserve it.

(Herbs)

Likewise, oil can be made from herbs and roots in this way: let common oil be heated and the herbs and roots are left there for at least a week. And let the grass and the roots be moved every day. Then bring the whole thing to a boil in a double boiler. And strain and reserve for use.

(Woods)

In general, oils are made from wood, so the wood is divided into very small pieces and placed in a pot with a hole in the bottom. And a covering of reborn earth, that is, clay, is placed on top of it, and it is sealed with paste so that the smoke does not escape. And let there be a trench in the ground, in which another unperforated pot is placed. And let a fire be made around the sides of the upper pot, and what will burn from the wood will fall into the lower pot, and it will be reserved for use.

(Roots & Herbs)

Oils can be made from roots and herbs: they are boiled in water and wine with a little shaking, and after it is seen that their virtue is a liquid, it is worshiped (prescribed?). And the oil is added to the filter. And so the whole boils until it is consumed, and the oil is reserved for use. Or boil the oil with the juice of roots or herbs until the juice is consumed. Then it is cultivated and reserved for use.

(Spices)

Similarly, we can boil any pulverized species in wine or water and after boiling it is cultivated. And the filter is boiled with added oil until it is consumed, filtered and reserved for use.

(Powders)

Likewise, we boil the powders mixed together with wine and oil, and when the wine is boiled and consumed, we strain it, and what comes out through the straining will be oil.

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