|1st Secretary of the Smithsonian Institution|
|Succeeded by||Spencer Fullerton Baird|
|2nd President of the National Academy of Sciences|
|Preceded by||Alexander Dallas Bache|
|Succeeded by||William Barton Rogers|
|Born||December 17, 1797|
Albany, New York, U.S.
|Died||May 13, 1878 (aged 80)|
Washington, D.C., U.S.
|Spouse(s)||Harriet Henry (née Alexander)|
|Children||William Alexander (1832–1862)|
Mary Anna (1834–1903)
Helen Louisa (1836–1912)
|Alma mater||The Albany Academy|
|Known for||Electromagnetic induction, Inventor of a precursor to the electric doorbell and electric relay|
|Institutions||The Albany Academy|
The College of New Jersey
Joseph Henry (December 17, 1797 – May 13, 1878) was an American scientist who served as the first Secretary of the Smithsonian Institution. He was the secretary for the National Institute for the Promotion of Science, a previous form of the Smithsonian Institution. While building electromagnets, Henry discovered electromagnetism, He also discovered mutual inductance independently of Michael Faraday though Faraday was the first to make the discovery and publish his results. Henry also developed the electromagnet into a practical device. Among his inventions was the electric doorbell (specifically a bell that could be rung at a distance via an electric wire, invented in 1831) and the electric relay (1835).
References[change | change source]
- "Planning a National Museum". Smithsonian Institution Archives. Archived from the original on 3 August 2009. Retrieved 2 January 2010.
- "A Brief History of Electromagnetism" (PDF).
- Ulaby, Fawwaz (2001-01-31). Fundamentals of Applied Electromagnetics (2nd ed.). Prentice Hall. p. 232. ISBN 978-0-13-032931-8.
- "Joseph Henry". Distinguished Members Gallery, National Academy of Sciences. Archived from the original on 2006-12-09. Retrieved 2006-11-30.
- Scientific writings of Joseph Henry, Volume 30, Issue 2. Smithsonian Institution. 1886. p. 434. ISBN 9780598400116.
- "The electromechanical relay of Joseph Henry". Georgi Dalakov. 4 January 2021.