D'Arsonval galvanometer no. 151667
1947
1947
1960
1930
1959
1906
1937-09-08
1951-17-05
1940-01-24
1951-17-05
1931-12-10
1935-08
1897-09-02
circa 1920
1849
1851
1851
1983; 1995
1948
1930-1940
1850-1864
1960-1975
1839; 1902-1903
1849-1851
1951-17-05
1948-08-30
1951-17-05
1939-07-06
1936
1948
1957
1958
1949
1900-1925
1899-08-26
1912
1851
1851
1851
1930
1670
1905
circa 1953
1883
1936
1892
mid-20th century
1936-04-05
1876