
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1993
1989
1990-1991
1986
1986
1985
1985
1987
1987
1985
1986
1985
1992
1986
1986
1986
1985
1985
1985
1986
1986
1986
1985
1986
1986
1986
1986
1986
1986
1990
1990
1990
1990s
1990-1991
1989
1985
1990
1989
1985
2000-100
2000-100 BCE
1988
1993
1988-1993
1986
1988
1990-96
1988
1988