“Since there is an odd number of senses, and since an odd number always has a middle, it seems the sense of smell is itself in the middle between the haptic senses, i.e. touch and taste, and the mediated senses, i.e. sight and hearing. For this reason smell is also a certain affection both of things that are nourishing (for these are in the class of haptic things) and of things that are audible and visible, which is why [animals] smell in both air and water. Thus, the object of smell is something common to both of these classes, belonging to the haptic, and to the audible and transparent. That’s also why scent has reasonably been compared to a kind of dye-bath and a washing of the dry in the moist and liquid.”

ἔοικε δ' ἡ αἴσθησις ἡ τοῦ ὀσφραίνεσθαι, περιττῶν οὐσῶν τῶν αἰσθήσεων καὶ τοῦ ἀριθμοῦ ἔχοντος μέσον τοῦ περιττοῦ, καὶ αὐτὴ μέση εἶναι τῶν τε ἁπτικῶν, οἷον ἁφῆς καὶ γεύσεως, καὶ τῶν δι' ἄλλου αἰσθητικῶν, οἷον ὄψεως καὶ ἀκοῆς. διὸ καὶ τὸ ὀσφραντὸν τῶν θρεπτικῶν ἐστὶ πάθος τι (ταῦτα δ' ἐν τῷ ἁπτῷ γένει), καὶ τοῦ ἀκουστοῦ δὲ καὶ τοῦ ὁρατοῦ, διὸ καὶ ἐν ἀέρι καὶ ἐν ὕδατι ὀσμῶνται. ὥστ' ἐστὶ τὸ ὀσφραντὸν κοινόν τι τούτων ἀμφοτέρων, καὶ τῷ τε ἁπτῷ ὑπάρχει καὶ τῷ ἀκουστῷ καὶ τῷ διαφανεῖ· διὸ καὶ εὐλόγως παρείκασται ξηρότητος ἐν ὑγρῷ καὶ χυτῷ οἷον βαφή τις εἶναι καὶ πλύσις.

Aristotle, On Sense and Sensible Objects, 5.27–28, 445a4–445a14

“They use aromatics for all perfumes. With some they treat the oil as with a mordant [ἐπιστύφοντες], with others they impart the scent derived from them. For in all cases they treat the oil as with a mordant [ὑποστύφουσι] in order that the oil might become more receptive to the scent, just like wool into a dye-bath. They use the weaker of the aromatics as a mordant, then later they add the one whose scent they wish to preserve. For the last one added always dominates, even if it is not much in quantity. For example, if someone were to add a mna of myrrh into a kotyle of oil, and later add two drachmas of cinnamon, the two drachmas of cinnamon would dominate.'“

Χρῶνται δὲ πρὸς πάντα τοῖς ἀρώμασι, τοῖς μὲν ἐπιστύφοντες τὸ ἔλαιον τοῖς δὲ καὶ τὴν ὀσμὴν ἐκ τούτων ἐμποιοῦντες. Ὑποστύφουσι γὰρ πᾶν εἰς τὸ δέξασθαι μᾶλλον τὴν ὀσμὴν ὥσπερ τὰ ἔρια εἰς τὴν βαφήν. Ὑποστύφεται δὲ τοῖς ἀσθενεστέροις τῶν ἀρωμάτων, εἶθ' ὕστερον ἐμβάλλουσιν ἀφ' οὗ ἂν βούλωνται τὴν ὀσμὴν λαβεῖν· ἐπικρατεῖ γὰρ ἀεὶ τὸ ἔσχατον ἐμβαλλόμενον καὶ ἂν ἔλαττον ᾖ· οἷον ἐὰν εἰς κοτύλην σμύρνης ἐμβληθῇ μνᾶ καὶ ὕστερον ἐμβληθῶσι κιναμώμου δραχμαὶ δύο, κρατοῦσιν αἱ τοῦ κιναμώμου δύο δραχμαί.

Theophrastus, On Scents, 4.17