Henri Deslandres

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Henri Alexandre Deslandres was director of the Observatoire de Meudon and taught at the École Supérieure d’Aéronautique et de Construction Mécanique when it opened in 1909. His most direct published contribution to aeronautics seems to be a technique for determining the speed of an aircraft.

Deslandres started his career in the army but in 1881 left to pursue academic work in science; he worked at the physics laboratory of the École polytechnique.[1] His focus was apparently optics, light, photography, etc., and in 1894 he invented a spectroheliograph for photographing the Sun.[2]

Deslandres returned to the military during World War I and served as Colonel in the Engineers, during which time he was known for developing a "canon d'accompagnement" apparently to be used in conjunction with an infantry advance.[3][4]

Publications by or about Henri Deslandres

Publications by or about H. Deslandres


  1. Frederick John Marrian Stratton, "Henri Alexandre Deslandres, 1853-1948", November 1954.
  2. "Henri-Alexandre Deslandres", Encyclopedia Brittanica, 1998; accessed 12 April 2019.
  3. F. J. M. Stratton, "bituary Notices: Deslandres, Henri Alexandre", Monthly Notices of the Royal Astronomical Society, Vol. 109, p.141, no. 2, 1949.
  4. Other incidental sources mentioning the cannon: [1], [2], [3], [4] – le «Jouhandeau-Deslandre».


Names Henri-Alexandre Deslandres
Birth date 1853-07-24
Death date 1948-01-15
Countries FR
Locations Paris
Occupations military officer, scientist, professor
Tech areas Astronomy, physics, Photography
Affiliations Observatoire de Meudon, École Supérieure d’Aéronautique et de Construction Mécanique, Paris Observatory, Académie des Sciences, Royal Astronomical Society
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