Haldane guesses that a dog would probably be able to place the acids in the order of their molecular weights by their smells, just as a man could place a number of piano wires in the order of their lengths by means of their notes.
Haldane olettaa, että koira voisi asettaa hapot molekyylimassan järjestykseen yksin hajun avulla aivan kuten ihminen voisi asettaa pianonkielet pituusjärjestykseen niiden soinnin perusteella.