We will also take a few portions for the left hand from the finale.

In these you must carefully observe the directions which are given for its performance, and try to execute every thing correctly and clearly; for a careless bass is prejudicial to the very best playing in the treble.
My lesson is now at an end; for we have taken up a good deal of time at the beginning with the scales, and passing the thumb under correctly, with the different species of touch, and the appropriate exercises for these.

I do not wish you yet to practise the first variation with both hands together, for you do not yet strike the skipping bass evenly enough and with sufficient precision; and you might accustom yourself to inaccuracies, especially as your left hand has, as usual, been neglected, and is inferior to the right in lightness and rapidity.

We shall find this a hindrance; for the object is not to practise much, but to practise correctly.

Therefore play these passages first slowly, then quicker, at last very fast; then slow again, sometimes _staccato_, sometimes _legato_, _piano_, and also moderately loud; but never when the hands and fingers are fatigued, therefore not too continuously; but many times in the course of the day, and always with fresh energy.