Coherer

1890

Coherer

The book of science

Tom Sharp

Edouard Branly electromagnetism

Coherer

History of metal filings

Cohering

In radios, the coherer was replaced by the electrolytic detector, the crystal diode, and vacuum tubes such as the Fleming valve.

The French term particules denotes a small element of a body.

See also in The book of science:

Readings on wikipedia: