§6.9Τὸν αὐτὸν δὲ τρόπον τοῦτον καὶ τὰ περὶ τὸν τράχηλον, καὶ ὅλως ὅσα βραχεῖαν τὴν τροφὴν λαμβάνει.
In this same manner also the hair around the neck, and in general all that receive a small amount of nourishment, behave.
Δῆλον δέ· καὶ γὰρ πρὸ τῆς πολιώσεως ἅπαντα τὰ τριχώματα μεταβάλλει καὶ γίνεται πυρρὰ διὰ τὸ πάλιν τὴν τροφὴν ὑπολείπουσαν καταξηραίνεσθαι ταχέως.
And this is clear; for indeed before turning grey, all hair changes and becomes reddish because the nourishment, failing again, is quickly dried up.
§6.10Τὸ δὲ τελευταῖον λευκά, πρότερον ἢ μελανθῆναι τὸ ὑγρόν, τῆς τροφῆς ἐν αὐτοῖς ἐκπεττομένης.
And finally they become white, before the moisture turns black, because the nourishment in them is ripened.
Μάλιστα δὲ τοῦτο ἐπὶ τῶν ὑποζυγίων φανερόν ἐστιν· πάντων γὰρ τὰ τριχώματα γίνεται λευκά.
And this is especially manifest in beasts of burden; for the hair of all of them becomes white.
Τῶν γὰρ τόπων οὐ δυναμένων ὁμοίως ἐπισπᾶσθαι τὴν τροφὴν διὰ τὴν ἀσθένειαν τὴν τοῦ θερμοῦ, ταχέως καταξηραινόμενον τὸ ὑγρὸν γίνεται λευκόν.
For as the parts are unable to draw the nourishment in like manner because of the weakness of the heat, the moisture, being quickly dried up, becomes white.
§6.11Καὶ τὰ περὶ τοὺς κροτάφους μάλιστα πάντων πολιοῦνται, καὶ ὅλως περὶ τοὺς ἀσθενεῖς καὶ πεπονηκότας τῶν τόπων.
And the hair around the temples turns grey most of all, and in general around the weak and exhausted parts.
Παρὸ καὶ παρὰ πάντα μάλιστα εἰς τοῦτο τὸ χρῶμα μεταβάλλει, ὅταν τὴν φύσιν παραλλάξῃ τὴν οἰκείαν.
Therefore, above all things, it changes most into this color whenever it departs from its own proper nature.
§6.12Καὶ γὰρ λαγὼς ἤδη γέγονε λευκός, καὶ μέλας δέ ποτε πέφηνε καὶ ἔλαφος καὶ ἄρκτος, ὁμοίως δὲ τούτοις καὶ ὄρτυξ καὶ πέρδιξ καὶ χελιδών.
For indeed a hare has before now become white, and sometimes a black deer and bear have appeared, and in like manner also a quail, a partridge, and a swallow.
Ὅταν γὰρ ἀσθενήσωσι τῇ γενέσει, πάντα τὰ τοιαῦτα διὰ τὴν ὀλιγότητα τῆς τροφῆς πρὸ ὥρας ἐκπεττόμενα γίνεται λευκά.
For when they become weak in their generation, all such things, being ripened before their time because of the scarcity of nourishment, become white.
§6.13Οὕτως καὶ τὰ τῶν παίδων εὐθὺς καὶ τὰς κεφαλὰς ἴσχει λευκὰς καὶ τὰ βλέφαρα καὶ τὰς ὀφρῦς, ὥσπερ καὶ τῶν ἄλλων ἑκάστῳ πρὸς τὸ γῆρας φανερῶς ἅπασι δι᾽ ἀσθένειαν καὶ ὀλιγότητα [τῆς τροφῆς] συμβαίνει τὸ πάθος.
In this way some children also have from the very first white heads and eyelashes and eyebrows, just as for each of the others toward old age this affection manifestly happens to all through weakness and scarcity [of nourishment].
§6.14Διὸ καὶ τὰ πλεῖστα τῶν ζῴων ἀσθενέστερα γίνεται τὰ λευκὰ τῶν μελάνων· πρότερον γὰρ ἢ τὴν αὔξησιν αὐτῶν τελειωθῆναι διὰ τὴν ὀλινγότητα τῆς τροφῆς ἐκπεττόμενα γίνεται λευκά, καθάπερ καὶ τῶν καρπῶν ὅσοι νενοσηκότες τυγχάνουσιν· καὶ γὰρ οὗτοι πολὺ μᾶλλον δι᾽ ἀσθένειαν ἐκπέττονται.
Therefore also most white animals are weaker than black ones; for before their growth is completed, they become white, being ripened because of the scarcity of nourishment, just like those of fruits which happen to be diseased; for these also are ripened much more through weakness.
§6.15Ὅσα δὲ γίνεται λευκά, πολὺ διαφέροντα ἐκ τῶν ἄλλων, οἶον ἵπποι καὶ κύνες.
But those which become white, differing greatly from the others, such as horses and dogs.
δὲ τοιαῦτα μεταβάλλει πάντα ἐκ τοῦ κατὰ φύσιν χρώματος εἰς τὸ λευκὸν διὰ τὴν εὐτροφίαν.
And all such things change from their natural color into white because of well-nourished condition.
Τὸ γὰρ ὑγρὸν ἐν τοῖς τοιούτοις οὐ χρονιζόμενον, ἀλλ᾽ ἀναλισκόμενον διὰ τὴν αὔξησιν, οὐ γίνεται μέλαν.
For the moisture in such cases, not remaining long but being consumed for growth, does not become black.
§6.16Τὰ πλεῖστα γάρ ἐστι τῶν τοιούτων ὑγρὰ καὶ εὔσαρκα διὰ τὴν εὐτροφίαν.
For most of such animals are moist and well-fleshed because of their well-nourished condition.
Διόπερ οὐδὲ μεταβάλλει τὰ λευκὰ τῶν τριχσωμάτων.
Therefore, their white hair does not change.
Φανερὸν δὲ τοῦτο ἐστίν· καὶ γὰρ τὰ μέλανα πρότερον τῆς πολιώσεως γίνεται πυρρά, ἤδη τῆς τροφῆς ἐν αὐτοῖς ὑπολειπούσης καὶ μᾶλλον ἐκπεττομένης, τὸ δὲ τελευταῖον λευκά.
And this is clear; for indeed black hairs, before turning grey, become reddish, as the nourishment in them is already failing and becoming more ripened, and finally they become white.
§6.17Καίτοι τινὲς ὑπολαμβάνουσι μέλανα γίνεσθαι πάντα διὰ τὸ συγκάεσθαι τὴν τροφὴν αὐτῶν ὑπὸ τοῦ θερμοῦ καθάπερ καὶ τὸ αἶμα καὶ τῶν ἄλλων ἕκαστον, διαμαρτάνοντες.
Yet some assume that all things become black because their nourishment is burnt up by the heat, just like blood and each of the other things, but they are mistaken.
Ἔνια γὰρ καὶ τῶν ζῴων εὐθὺς ἐν ἀρχῇ γίνεται μέλανα, οἶον κύνες καὶ αἶγες καὶ βόες, καὶ ὅλως ὅσων τὰ δέρματα καὶ τὰ τριχώματα κατ᾽ ἀρχὰς ἔχει τροφήν, προϊούσης δὲ τῆς ἡλικίας ἧττον.
For some animals become black straight from the beginning, such as dogs, goats, and cattle, and in general all those whose skins and hair have nourishment at the beginning, but less so as age advances.
§6.18Καίτοι γε οὐκ ἐχρῆν, ἀλλὰ πάντων ἔδει καὶ τὰ τριχώματα μελαίνεσθαι κατὰ τὴν ἀκμήν, καθ᾽ ὃν ἄν χρόνον μάλιστα αὐτῶν ἰσχύῃ καὶ τὸ θερμόν, καὶ μᾶλλον ἅπαντα πολιοῦσθαι κατ᾽ ἀρχάς.
And yet it should not be so, but rather the hair of all ought to turn black at their prime, at whatever time their heat is strongest, and they should rather all turn grey at the beginning.
Πολὺ γὰρ ἁπάντων ἀπὸ πρώτης ἀσθενέστερόν τι γίνεται τὸ θερμὸν ἢ καθ᾽ ὃν χρόνον ἄρχεται τὰ τριχώματα αὐτῶν λευκαίνεσθαι.
For from the very first, the heat is much weaker in all of them than at the time when their hair begins to turn white.