Carl Ludwig, German physician and physiologist (b. 1815)
Carl Friedrich Wilhelm Ludwig (German: [ˈluːtvɪç]; 29 December 1816 – 23 April 1895) was a German physician and physiologist. His work as both a researcher and teacher had a major influence on the understanding, methods and apparatus used in almost all branches of physiology.
In 1842, Ludwig became a professor of physiology and in 1846 of comparative anatomy. From professorships in Zurich and Vienna he went in 1865 to the University of Leipzig and developed there the Physiological Institute, designated today after him: Carl Ludwig Institute of Physiology. Ludwig researched several topics such as the physiology of blood pressure, urinary excretion, and anesthesia. He received the Copley Medal in 1884 for his research. In 1869, he was elected a foreign member of the Royal Swedish Academy of Sciences. He is credited for inventing the stromuhr.
Since 1932, the Carl Ludwig Honorary Medal is awarded by the German Society for Cardiology to outstanding investigators in the area of cardiovascular research.

1895Apr, 23
Carl Ludwig
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Events on 1895
- 24Feb
Cuban War of Independence
Revolution breaks out in Baire, a town near Santiago de Cuba, beginning the Cuban War of Independence, that ends with the Spanish-American War in 1898. - 3Apr
Oscar Wilde
The trial in the libel case brought by Oscar Wilde begins, eventually resulting in his imprisonment on charges of homosexuality. - 6Apr
John Douglas, 9th Marquess of Queensberry
Oscar Wilde is arrested in the Cadogan Hotel, London, after losing a libel case against the Marquess of Queensberry. - 7May
Alexander Stepanovich Popov
In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector — a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day. - 28Jun
Greater Republic of Central America
El Salvador, Honduras and Nicaragua form the Greater Republic of Central America.