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