  Ludvig V. Lorenz (1829-1891) was Denmark's first theoretical physicist and
the only one whose work attracted international attention in the second half of
the nineteenth century. This paper presents a survey of Lorenz's contributions
to physics with an emphasis on his work in electrodynamics and electrical
science. His 1867 electrodynamic theory of light was of a theoretical and
foundational nature, while his unpublished theory of telephone currents was
oriented toward practical problems in long-distance telephony. Lorenz's
theories are briefly compared to those of better known physicists such as H. A.
Lorentz, J. C. Maxwell, and O. Heaviside.
