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French inventor and engineer, he graduated from the Polytechnic School and he invented the medimaremeter.
General inspector of Mines, director of the general leveling of France, member of the Academy of Sciences, he wrote many books and invented the medimaremeter, apparatus to know the variations according the sea level.
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variant spelling:
LALLEMAND, Jean-Pierre, dit Charles
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Curriculum vitae
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* 07.03.1857
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born
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1874
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Paris, France
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Graduated from the Polytechnic School.
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1884 - 1922
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Established by Charles Lallemand: The zero leveling, that Lallemand called "Normal Zero" was based on the observation of the Marseille's tidal from February 1st, 1885 to January 1st, 1897. These observations have identified a zero corresponding to the 0.329 m wide tidal for the Fort Saint-Jean scale. It is therefore 71 mm below the "Bourdaloue zero".
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1897
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Invention of the tide gauge (historical monument).
(We continue to accurately track the oscillations of the sea and an IGN surveyor continues to weekly wind up the mechanism and rate the sea-level measurements).
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1897
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Invention of the medimaremeter: The medimaremeter can mechanically filter tidal waves with a sensor communicating with the sea through a porous porcelain shell giving it a very long time constant.
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1912
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President of the French Association for the Advancement of Science.
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1919 - 1933
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He was president of the International Union of Geodesy and Geophysics.
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† 01.02.1938
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died
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