This Day In History
Wednesday, June 19, 2019
On This Day




February 22, 1857
Heinrich Hertz

Heinrich Rudolf Hertz was a German physicist who clarified and expanded the electromagnetic theory of light that had been put forth by Maxwell. He was the first to satisfactorily demonstrate the existence of electromagnetic waves by building an apparatus to produce and detect radio waves.
December 3, 1857
Joseph Conrad

Joseph Conrad (born Józef Teodor Konrad Korzeniowski) was a Polish-born English novelist.


February 15, 1857
Mikhail Glinka

Mikhail Ivanovich Glinka was the first Russian composer to gain wide recognition within his own country, and is often regarded as the father of Russian classical music. Glinka's compositions were an important influence on future Russian composers, notably the members of The Five, who took Glinka's lead and produced a distinctive Russian style of music.
May 23, 1857
Augustin-Louis Cauchy

Baron Augustin-Louis Cauchy was a French mathematician who was an early pioneer of analysis. He started the project of formulating and proving the theorems of infinitesimal calculus in a rigorous manner, rejecting the heuristic principle of the generality of algebra exploited by earlier authors.
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