
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1992-1994
1989
1994
1994
1990
1990s
1990-1991
1988-1993
2000-100
2000-100 BCE
1988
1993
1994
1986
1986
1986
1986
1986
1986
1990
1990
1990
1989
1990-1991
1986
1986
1986
1986
1986
1986
1989
1990
1989
1994
1986
1986
1992
1988
1988
circa 1990
1990s
1990
1987
1987
1994
1986
1986
1986
1986