'Bell-crank' engine, c. 1799
1795-1805 (original)
1795-1805 (original)
1968-1971
1903
1785
1898
1862
1775-1799 (original); 1900-1907 (model)
1815
1788
1794
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1819
1866
1892
1898
1791
1777
1797
1812-1814
1891
1804
1820
1903
1883-1891
1801-1830
1884-1887
1808