Pendulum the pendulum could be used to measure the force of gravity. During his expedition to Cayenne, French Guiana in 1671, Jean Richer found that a pendulum clock was minutes per day slower at Cayenne than at Paris. From this he deduced that the force of gravity was lower at Cayenne. In 1687, Isaac Newton in "Principia Mathematica" showed that this was because the Earth was not a true sphere but slightly oblate (flattened at the poles) from the effect of centrifugal force due to its rotation, causing gravity to increase with latitude. Portable pendulums began to be taken on voyages
Orgone accumulator. The song "Cloudbusting" by British singer Kate Bush describes Reich's arrest and incarceration through the eyes of his son, Peter. The 1985 video, in which Donald Sutherland plays Wilhelm Reich during his research and subsequent arrest, features a Foucault pendulum as an alternative method of demonstrating the rotational motion of the earth to prove the heretical view that the Earth was not the centre of the Universe. The Foucault pendulum in this video simultaneously connects and contrasts the disgraced Wilhelm Reich to both of the respected Foucaults, the scientist, Jean Bernard Léon Foucault and the philosopher, Michel Foucault, who