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Johann Jacob Baeyer (born 5 November 1794 in 
Berlin
Berlin ( , ) is the capital and List of cities in Germany by population, largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's List of cities in the European Union by population within ci ...
, died 10 September 1885 in Berlin) was a German geodesist
Geodesy ( ) is the Earth science of accurately measuring and understanding Earth's figure (geometric shape and size), orientation in space, and gravity. The field also incorporates studies of how these properties change over time and equival ...
and a lieutenant-general in the Royal Prussian Army
The Royal Prussian Army (1701–1919, german: Königlich Preußische Armee) served as the army of the Kingdom of Prussia. It became vital to the development of Brandenburg-Prussia as a European power.
The Prussian Army had its roots in the cor ...
. He was the first director of the Royal Prussian Geodetic Institute and is regarded as the founder of the International Association of Geodesy
The International Association of Geodesy (IAG) is a constituent association of the International Union of Geodesy and Geophysics. Overview
The precursors to the IAG were arc measurement campaigns. The IAG was founded in 1862 as the ''Mitteleuro ...
. He was the father of the Nobel Prize–winning chemist Adolf von Baeyer
Johann Friedrich Wilhelm Adolf von Baeyer (; 31 October 1835 – 20 August 1917) was a German chemist who synthesised indigo and developed a nomenclature for cyclic compounds (that was subsequently extended and adopted as part of the IUPAC org ...
. Baeyer was a Lutheran.
See also
*History of the metre
The history of the metre starts with the Scientific Revolution that is considered to have begun with Nicolaus Copernicus's publication of '' De revolutionibus orbium coelestium'' in 1543. Increasingly accurate measurements were required, and ...
* Seconds pendulum
A seconds pendulum is a pendulum whose period is precisely two seconds; one second for a swing in one direction and one second for the return swing, a frequency of 0.5 Hz.
Pendulum
A pendulum is a weight suspended from a pivot so that ...
References