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 gissar att en hund troligen kan ordna syrorna efter deras molekylärvikt utifrån deras lukt, precis som en människa kan ordna ett antal pianotrådar efter deras längd utifrån deras ton.