Why is the tone superior? You know, I suppose, that when a piano string is struck it vibrates. That is to say, it ceases to be a straight line, and becomes agitated into a series of waves. In order to increase the volume of the sound a thin layer of wood, called the sound board, is placed beneath the strings. As the string vibrates, this board vibrates in sympathy, and so the volume of sound is increased and enriched. Now the least thing may disturb the perfection of this sympathetic vibration. Accordingly, the superiority of the one piano is due to the fact that all its parts are of finer make and material, and are more perfectly adjusted to one another. They are in so perfect a relation, that there is no jar in any part, and thus the body of the instrument is a united whole.