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A gyroscope that is rotated to form an ellipse.

Gyroscope

A gyroscope that is rotated to form an ellipse.

"The Gyroscope is an instrument constructed by M. Foucault to make the rotation of the earth visible. The principle on which it proceeds is this– that, unless gravity intervene, a rotating body will not alter the direction in which its permanent axis points. In the gyroscope there is a rotating metallic disk, the middle point of whose axis is also the center of gravity of the machine. By this device the action of gravity is eliminated."—(Charles Leonard-Stuart, 1911)

Gyroscope

"The Gyroscope is an instrument constructed by M. Foucault to make the rotation of the earth visible.…

"Gyroscope. Gyroscopic top, an instrument consisting of a heavy fly-wheel revolving about an axis one point of which is fixed, but which is otherwise free to move in any way." -Whitney, 1911

Gyroscope

"Gyroscope. Gyroscopic top, an instrument consisting of a heavy fly-wheel revolving about an axis one…

"Foucault's Gyroscope. GYROSCOPE. An instrument consisting of a fly-wheel, the axis of which can turn freely in any direction, designed to illustrate the dynamics of rotating bodies." -Whitney, 1911

Foucault's Gyroscope

"Foucault's Gyroscope. GYROSCOPE. An instrument consisting of a fly-wheel, the axis of which can turn…

A toy consisting of a hollow and well balanced piece of wood turned in the shape of an hour glass. It is first placed upon a cord loosely hanging from two sticks held in the hands, and upon being made to rotate by the movement of the sticks it exhibits effects somewhat similar to those of a top.

String Toy

A toy consisting of a hollow and well balanced piece of wood turned in the shape of an hour glass. It…