A third error arises from misplaced economy: to spare the expense of gathering, people are in the habit of waiting till the berry falls from the tree. Others, again, who wish to follow a middle course in this respect, beat the fruit off with poles, and so inflict injury on the tree and ensure loss in the succeeding year; indeed, there was a very ancient regulation in existence relative to the gathering of the olive—“Neither pull nor beat the olive-tree.”[1659] Those who would observe a still greater degree of precaution, strike the branches lightly with a reed on one side of them; but even then the tree is reduced to bearing fruit but once in two years,[1660] in consequence of the injury done to the buds. Not less injurious, however, are the results of waiting till the berries fall from the tree; for, by remaining on it beyond the proper time, they deprive the crop that is coming on of its due share of nutriment, by occupying its place: a clear proof of which is, that if they are not gathered before the west winds prevail, they are found to have acquired renewed strength, and are all the later before they fall. CHAP. 4.—FIFTEEN VARIETIES OF OLIVES. The first olive that is gathered after the autumn is that known as the “posia,”[1661] the berry of which, owing to a vicious method of cultivation, and not any fault on the part of Nature, has the most flesh upon it. Next to this is the orchites, which contains the greatest quantity of oil, and then, after that, the radius. As these are of a peculiarly delicate nature, the heat very rapidly takes effect upon them, and the amurca they contain causes them to fall. On the other hand, the gathering of the tough, hard-skinned olive is put off so late as the month of March, it being well able to resist the effects of moisture, and, consequently, very small. Those varieties known as the Licinian, the Cominian, the Contian, and the Sergian, by the Sabines called the “royal”[1662] olive, do not turn black before the west winds prevail, or, in other words, before the sixth day before[1663] the ides of February. At this period it is generally thought that they begin to ripen, and as a most excellent oil is extracted from them, experience would seem to give its support to a theory which, in reality, is altogether wrong. The growers say that in the same degree that cold diminishes the oil, the ripeness of the berry augments it; whereas, in reality, the goodness of the oil is owing, not to the period at which the olives are gathered, but to the natural properties of this peculiar variety, in which the oil is remarkably slow in turning to amurca.