
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1984-1986
1978
1982
1985-1989
1978
1984; 1983
1987
1989
1975
1975-1985
1979
1986
1975
1976
1985
1984
1986
1976-1979
1976
1982
1980
1975
1983
circa 1983
1976
1987
1983
1984
1975
1975
1975
1975
1975
1975
1975
1986
1975
1975
1975
1975
1986
1975
1986
1984
1985
1984
1984
1984
1984