(p. 194) One event that occurred after Einthoven received the Nobel Prize in Physiology or Medicine in 1924 speaks volumes about his integrity. In the construction of his string galvanometer and laboratory experiments over many years, Einthoven was rather clumsy with his hands and relied very much on the collaboration of his chief assistant K. F. L. van der Woerdt. Years later, when he received the $40,000 in Nobel Prize money, Einthoven wished to share it with his assistant but soon learned that the man had died. He sought out the man’s two surviving sisters, who were living in genteel poverty in a kind of almshouse. He journeyed there by train and gave them half of the award money.
Meyers, Morton A. Happy Accidents: Serendipity in Modern Medical Breakthroughs. New York: Arcade Publishing, 2007.