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1Henrik Johan Walbeck — (1794 1823) was a Finnish geodesist studying the size and figure of the Earth by means of grade measurement.External links* [http://www.fgi.fi/yleis/historia eng.html Finnish Geodetic Institute] …
1Henrik Johan Walbeck — (1794 1823) was a Finnish geodesist studying the size and figure of the Earth by means of grade measurement.External links* [http://www.fgi.fi/yleis/historia eng.html Finnish Geodetic Institute] …