
Edison's Original Micro-Tasimeter, 1878
1878
1878
1970
1999
1933-1934
1878
1920
2016
circa 1963
circa 1950
1963-1964
1940
1879
1953
1929-1931
1980-1989
1910-1950
1926
06 January 1940
1970
1972
1977
1924
1978
1979
1968
1910
1986
1973
1935
1931
1909-1912
2020-2021
1900-1903
1929-1931
1959
1971
1978
1972