Joseph Henry

Background

An American scientist and the first Secretary of the Smithsonian Institution.

Contribution

Discovered electromagnetic self-induction independently of Faraday and built powerful electromagnets; the unit of inductance (the henry) is named for him.

Associated inventions

• Electric Motor & Generator

Collaborators & contemporaries

• Michael Faraday
• Ányos Jedlik
• Nikola Tesla
• Galileo Ferraris

Sources & further reading

Each citation names the publisher and the exact reference title.

• Smithsonian — National Museum of American HistorySmithsonian Institution · Museum
• APS News / This Month in Physics HistoryAmerican Physical Society · Professional body

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