Replica of the first Morse telegraph, 1835
1934
1934
1849
1850
1850
1851
1893-4
1851
1851
1850
1849
2000-100 BCE
1850
1863-7
1955; 1830
1849
circa 1850s
1990-96
1851
1849
1849
1934
1930 (replica); 1834 (original)
circa 1850
1851
1850
1851
1850
1705-1737
1870-1877
1850
1849
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1830 (original); 1967 (model)
1775-1799 (original); 1900-1907 (model)
4000-2001 BCE
1851
1888-185
1849
1871-1830
1849-1851
1850
1849
1851
1849
1851
1850
1849
2000-1350
1851