
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1984-1986
1985-1989
1984; 1983
1987
1989
1986
1985
1984
1986
1983
circa 1983
1987
1983
1984
1986
1986
1986
1984
1985
1984
1984
1984
1984
1984
1985
1984
1984
1984
1985
1986
1986
1986
1985
1986
1986
1986
1986
1986
1986
1984
1989
1984
1986
1985
1983
1989
1985
1984
1985