Here’s the next installment, No. 19.  Suggested tempo for this one is dotted quarter=60-65.  One stylistic thing is to make sure that when slurred sixteenth notes are immediately followed by staccato sixteenths that the last of the slurred notes is not clipped.  This is a very easy habit to fall into, especially at faster tempos.  Play the slurred notes full value, and then proceed with staccato. Another issue is concentration.  No. 19 is one of the longer studies in Book 1, and it is very easy to space out towards the end.