George III's pendulum
1762
1762
1751-1800
1783
1785
1785
1806
1815
1778
1762
1769
1765-1806
1755
1807
1790-1819
1761
1750-1795
1790-1819
1761
1790-1819
1782-1793
1790-1819
1776
1795-1805
1757
1784
1762
1784
1785-1790
1762
1798
1762
1808
1762
1752
1752
1762
1790-1819
1752
1790-1819
1762
1799-1802
1755
1809
1750
1790-1819
1790-1819
1790-1819
1794
1750-1800
1820