Charles-Louis Hanon
Exercise Two
Overview
(3-4) When this exercise is mastered, recommence the preceding one, and play both together four times. without interruption; the fingers will gain considerably by practising these exercises, and those following, in this way. (1) The fourth and fifth fingers being naturally weak, it should be observed that this exercise, and those following it up to No 31, are intended to render them as strong and agile as the second and third.（Source）
