Do not expose yourselves to the derision of every apprentice in piano manufacture.

Have you no understanding of the construction of the piano?
You have played upon it, or have, some of you, stormed upon it, for the last ten years; and yet you have not taken pains to obtain even a superficial acquaintance with its mechanism.

The hammer, which by its stroke upon the string has produced the sound, falls immediately when the tone resounds; and after that you may caress the key which has set the hammer in motion, fidget round on it as much as you please, and stagger up and down over it, in your intoxicated passion,--no more sound is to be brought out from it, with all your trembling and quivering.

It is only the public who are quivering with laughter at your absurdity.
5.

Give up the practice of extreme stretches.