HELMHOLTZ, HERMANN LUDWIG FERDINAND VON (1821-1894), German philosopher and man of science, was born on the 31st of August 1821 at Potsdam, near Berlin.
Delicate in early life, Helmholtz became by habit a student, and his father at the same time directed his thoughts to natural phenomena.
In 1847 Helmholtz read to the Physical Society of Berlin a famous paper, Ober die Erhaltung der Kraft (on the conservation of force), which became one of the epoch-making papers of the century; indeed, along with J.
Von Helmholtz devised a tangent galvanometer with two coils.
Helmholtz gave at the same time a mathematical theory of induced currents and a valuable series of experiments in support of them (Pogg.