[38] for at the time of the winter solstice their leaves wither and fall to the ground; and the eyes, as they are called by the agricultural labourers, which appear on the young shoots, close up like the eyes of animals, and all the mouths which are calculated to send forth young buds, are bound up; their internal nature being at that time confined and quiet, in order that, when it has taken breath, like a wrestler who has gone through a little preliminary exercise, and having again collected its appropriate strength, it may return again to its customary operations. And this happens at the seasons of both spring and summer,