Replica of the first Morse telegraph, 1835
1934
1934
1845
1842
1842
1842
1845
1845
2000-100 BCE
1893-4
1863-7
1843
1955; 1830
1844
1844
1990-96
1842
1930 (replica); 1834 (original)
circa 1842
1845
1775-1799 (original); 1900-1907 (model)
4000-2001 BCE
1844
1839 (original); circa 1988 (replica)
1705-1737
1870-1877
1844
1842
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1830 (original); 1967 (model)
1844
1843
1843
1844
1825; 1910
1843
1844
1843
1843
1845
1842
1845
30 CE
30 CE
2686-2613 BCE
1888-185
1945-50
1842-1845
1842-1845
1824 (original); 1891 (model)