Von Helmholtz in the chair of experimental physics and directorship of the Berlin Physical Institute.
Von Helmholtz at the house of H.
Von Helmholtz at Berlin.
Later in the same year he became assistant to Helmholtz in the physical laboratory of the Berlin Institute.
Imagining that this would interest Hertz and be successfully attacked by him, Helmholtz specially drew his attention to it, and promised him the assistance of the Institute if he decided to work on the subject; but Hertz did not take it up seriously at that time, because he could not think of any procedure likely to prove effective.