
Kymograph mounted on a trolley and powered by mains electricity
1945-1950
1945-1950
1968-1972
2005
Unknown
1958
circa 2007
1977
1800-1900
1968-72
1873-1876
1798 (original); 1977 (model)
1956
1890-1910
1765
1960-1980
1940-1945
1910-1950
1956
1923-1939
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868
1868