Foucault pendulum with a 67-m-long wire from the dome of the Panthéon, Paris. The plane of the pendulum's swing rotated clockwise approximately 11.3° per hour, making a full circle in approximately 31.8 hours. The original bob used in 1851 at the Panthéon was moved in 1855 to the Conservatoire des Arts et Métiers in Paris. A second temporary installation was made for the 50th anniversary in 1902. During museum reconstruction in the 1990s, the original pendulum was temporarily displayed at the Panthéon (1995), but was later returned to the Musée des Arts et Métiers before it reopened in 2000. On April 6,
Which? shops selling hearing aids and an investigation into electronics shop staffs' knowledge of the products that they sell. Other publications include "Which? Travel", "Which? Car", "Which? Money", "Which? Computing" and "Which? Gardening". The Consumer's Association has experienced sharply increased income in recent years as its trading subsidiaries have expanded their activities. Which? regularly briefs and lobbies MPs, Peers, AMs, MLAs, MSPs and MEPs on national, European and international consumer issues. For example, Which? successfully lobbied to put an end to the '65-day rule' that allowed energy companies to wait 65 days before informing their customers of a price change. Following