Kater’s pendulum

1817 Kater’s pendulum

The book of science

Tom Sharp

Christiaan Huygens, Gaspard de Prony, Henry Kater kinematics Kater’s pendulum

Kater’s pendulum

Little g

Local variation

Kater’s pendulum was so commonly used to measure the strength of the gravitational field that instead of expressing the value in units of acceleration, distance per second squared, scientists expressed the value as the length of the seconds pendulum.

Jean Richer was the first to discover, in 1671, that gravity did not have the same magnitude over the surface of the earth. This was 244 years before Einstein’s general theory of relativity.

See also in The book of science:

Readings on wikipedia: