Answer:
The substance which determines the form of a column of air is demonstrabl y indifferent for the timbre or quality of tone so long as the sides of the tubes are equally elastic and rigid.
Explanation:The Scottish timbre is rarely wanting, even in places where scholastic or classical custom might have claimed, as in other literatures, an exclusive privilege.
Timbre itself is, as Helmholtz shows, a kind of harmony felt but not heard.
