
Brennan's Gyroscopic Mono-rail Car
1907
1907
1909-1910
1839 (original); circa 1988 (replica)
1913
1913
1830 (original); 1967 (model)
1907
1952-3
1910
circa 1910
1910
1955; 1830
1914
1914
1914
1910
1910
1934
1907
2000-100 BCE
1914
1913
1914
1914
1872 (original); 1909 (model)
c.1912
1910
1908
1909
1912
1912
1911
1910
circa 1913
1772 (original); 1919 (model)
1913
1990-96
1910-1914
1907
1908
1705-1737
1910
1801-1892 (prepared); 1946 (element replaced)
1934
1908
1914
1914
4000-2001 BCE
c.1912
c.1912