George III's pendulum
1762
1762
1778
1762
1769
1761
1761
1776
1762
1762
1762
1762
1762
1762
1764
1762
1762
1770
1776-1780
1778
1776-1780
2000-100 BCE
1776-1780
1760-1770
1705-1737
1762
1761
1763
1761-1762
1776
1761
circa 1780
1760-1775
1761
1762
1778-1780
1765
1762
1761
1770
1780
1772 (original); 1919 (model)
1761
1990-96
1760-1772
1771
1769
1775
1760
1760-1775 probable date
1761