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"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…

"Gyrostat. An instrument for illustrating the dynamics of rotation, composed of a box or case having a sharp bearing-edge in the form of a regular polygon, and containing a fly-wheel having its center and its direction of rotation in the plane of the bearing-edge." -Whitney, 1911

Gyrostat

"Gyrostat. An instrument for illustrating the dynamics of rotation, composed of a box or case having…

"Brown's revolving squeezer, the ball being made to pass between two rotating cams which flatten it out, and subsequently between the second of these and a third which carries the operation further; in more powerful machines of the kind a larger number of cams still is employed." — The Encyclopedia Britannica, 1893

Revolving Squeezer

"Brown's revolving squeezer, the ball being made to pass between two rotating cams which flatten it…

"Brown's revolving squeezer, the ball being made to pass between two rotating cams which flatten it out, and subsequently between the second of these and a third which carries the operation further; in more powerful machines of the kind a larger number of cams still is employed." — The Encyclopedia Britannica, 1893

Revolving Squeezer

"Brown's revolving squeezer, the ball being made to pass between two rotating cams which flatten it…

A revolving flower stand made of wire.

Novelty Revolving Stand

A revolving flower stand made of wire.

"In 1835 Mr. Stevenson, in a report to the Northern Lighthouse Board, proposed to add fixed reflecting prisms p below the lenses of Fresnel's revolving light, and he communicated this proposal to M. L. Fresnel, who approved of his suggestion, and assisted in carrying out the design in 1843. This combination added, however, but little to the power of the flash, and produced both a periodically flashing and constantly fixed light; but it must be remembered that the prism for fixed lights was the only kind of reflecting prism then known." —The Encyclopedia Britannica, 1910

Stevensons Revolving Light

"In 1835 Mr. Stevenson, in a report to the Northern Lighthouse Board, proposed to add fixed reflecting…

This steam valve design features revolving cup valves which are able to cut off steam at any given revolution inside an engine.

Steam Valve

This steam valve design features revolving cup valves which are able to cut off steam at any given revolution…

"Showing diagrammatically one explanation of the production of light waves by revolving electrons." —Croft 1917

Light Waves Explanation

"Showing diagrammatically one explanation of the production of light waves by revolving electrons."…

"The wheel and axle is simply a revolving lever of the first kind. One application of the lever can not move a body any great distance; but, by means of the wheel and axle, the action of the lever is continued uninterruptedly." —Quackenbos 1859

Wheel and Axle

"The wheel and axle is simply a revolving lever of the first kind. One application of the lever can…