
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1985
1990
1985
1988-1990
1985
1985
1986
1986
1986
1985
1985
1985
1986
1985
1986
1986
1990
1990
1990
1990s
1985
1989
1986
1986
1986
1986
1986
1986
1989
1985
1986
1989
2000-100 BCE
1988
1986
1990
1988
circa 1990
1985-1988
1988
1988
1985
1986
1986
1986
1986
1986
1985
1987