Josefa Heifetz, daughter of renowned violinist Jascha Heifetz, is a pianist, teacher, and lexicographer well-versed in the idiomatic languages of both the keyboard and the English language. Her 24 Exercises at the Piano by Josefa Heifetz 
contains a series of trills, scales, chromatics, and arpeggios in single-note strings designed to help the player develop finger independence, strength and agility in each hand.
