
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1976-1979
1976
1984-1986
circa 1980
1975
1985
1980-1990
1985
1976-1982
1973
1979
1981-1990
1978
1978
1974
1981-1990
1974
1990
1981-1983
1985
1986
1979
1985
1984
1982
1984
1975
1974
1973
1974
1974
1974-1975
1975
1975
1975
1975
1974
1975
1975
1986
1974
1974
1975
1975
1975
1975
1974
1986
1975