
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1987
1989
1986
1986
1987
1986
1986
1986
1986
1986
1986
1986
1986
1986
1986
1986
1986
1990
1990
1990
1990s
1986
1989
2000-100 BCE
1988
1986
1989
1990
1988
1990-96
1986
1839 (original); circa 1988 (replica)
1989
1988
1988
1990
1988
circa 1990
1986
1986
1986
1986
1986
1986
1987
1986
1990
1990s
1990