model locomotion no 1
1825
1825
circa 1840
1837
1840
1827
1837
1934
1834
1834
1834
1821-1831
1835
1825
1841
1955; 1830
1837
1829
1837
1832
1825-1835
1893-4
1841
1863-7
1826
1838
1836
1815
2000-100 BCE
1815
1837
1837
1833
1837
1838
1820
1822-1840
1831
1839
1815
1839
1815-1825
1835
1840
circa 1832
1820-1830
1831
1826
1838
1826
1839