
Double beam engine model
1840-1851
1840-1851
1845
1845
1831
1851
1842
1955; 1830
1842
1829-1851
1849
1840-1850
1830-1850
1846
1842
1856
1854
1840
1893-4
1837
1851
1852
1830
1840
1849
1848
1830-1850
1837
2000-100 BCE
1833
1831
1829
1855
1855
1848-1852
1841
1846
1844
1934
1845-1851
1844
1835-1845
1856
1851
1863-7
1829
1856
1845
1855
1842
1852