Note 1688 — BOOK XV. THE NATURAL HISTORY OF THE FRUIT-TREES.

There are no good grounds for this recommendation, which is based on the erroneous supposition that heat increases the oil in the berry. The free circulation of the air also ought not to be restricted, as nothing is gained by it. In general, the method of extracting the oil is the same with the moderns as with the ancients, though these last did not employ the aid of boiling water.