Replica of the first Morse telegraph, 1835
1934
1934
1845
1849
circa 1840
1840
1842
1850
1842
1840-1850
1847
1842
1845
1845
2000-100 BCE
1893-4
1863-7
1850
1849
1841
1846
1848
1850
1850
1846
1841
1843
1840-1845
1955; 1830
1844
1844
1840
1849
1846
1849
1849
1990-96
1842
1850
1846
1930 (replica); 1834 (original)
circa 1846
circa 1842
circa 1850s
1850
1845
1841
1775-1799 (original); 1900-1907 (model)
4000-2001 BCE
1844
circa 1850