ClipArt ETC
A piece in clocks and watches that converts rotational motion into oscillation, as in a pendulum.

Deadbeat Escapement

A piece in clocks and watches that converts rotational motion into oscillation, as in a pendulum.

A piece in clocks and watches that converts rotational motion into oscillation, as in a pendulum.

Recoiling Escapement

A piece in clocks and watches that converts rotational motion into oscillation, as in a pendulum.

"The curve of sines, in which the abscissas are proportional to an angle, and the ordinates to its sine." -Whitney, 1889

Sinusoid or Sine Wave

"The curve of sines, in which the abscissas are proportional to an angle, and the ordinates to its sine."…

The figure "shows the effect of a circular island upon the cotidal lines." -Coast and Geodetic Survey, 1901

Island Tides

The figure "shows the effect of a circular island upon the cotidal lines." -Coast and Geodetic Survey,…

"It is seen that the motion of each particle is rectilinear and simple harmonic...The paths are vertical where...multiplies of 180 degrees and horizontal at points halfway between." -Coast and Geodetic Survey, 1901

Wave Motion

"It is seen that the motion of each particle is rectilinear and simple harmonic...The paths are vertical…

The figure "represents the progress of a wave up a broad depression or valley 40 miles wide at the bottom and 240 at the top, the depth at the center being 1000 feet." -Coast and Geodetic Survey, 1901

Wave Progress

The figure "represents the progress of a wave up a broad depression or valley 40 miles wide at the bottom…