Maxwell first expressed his equations in terms of potentials with Cartesian coordinates but others only could understand the concept when Heaviside and Hertz re wrote his equations in terms of field quantities and later when Lorentz further simplified the concepts by adding vector notation.

Hertz did his great work on radio waves at the University of Karlsruhe right near where Schroff is today and in the same general Swabian region where ERNI Components is located and which is also the home of Robert Bosch and Gottlieb Daimler and many other industrialists.

Color Perception

Kenetic Theory of Gases

Electricity and Magnetism -

Theorized that there were other forms of Electromagnetic Energy like heat and light but which could not be seen.

Material from:

Colliers Encyclopedia

Proceedings of the IEEE July 1998