Hi,
Some of this is hard for me to understand. I've done my best.
1-The nail one the first finger is curved (curve the edge of it acutely.)
It will cause a big resistance and less impact between the finger and the flesh because the first nail is actually longer at the corner.
Note:
If the nail is too long, the speed and ease with which the fingertip and nail attack the string is consderably diminished, because the resistance has been increased.
2- The second (second what?) will cause less resistance and completely impact between the flesh and (what?). The sound will be produced withot effort.
- In fact, the nail should be somewhat square at the corner, so that the edge meets the flesh at the corner and the high arch.
Note:
Arches always lessen resistance.
Clive