"If the plane is inclined downwards, the ball is instantly thrown into motion, because the centre of…

Illustration showing the periodic center of motion as it often happens when two positions of a line…

"Attach a ball, for instance, to a cord; and , fastening the end of the cord at a point, O, give a quick…

Illustration showing a centroid, "the curve passing through the successive positions of the instantaneous…

"Compound motion is that which is produced by two or more forces, acting in different directions, on…

"This is the curve of the heart cam for converting uniform rotary motion into uniform reciprocal motion."…

"Since these curves are not closed, one pair cannot be used for continuous motion; but a pair of such…

"A drill to which a steady momentum is imparted by means of a fly-wheel having a reciprocating motion…

"Thus, if we suppose the conducting wire be placed in a vertical situation, as shown, and p, n, the…

"If two equal ellipses, each turning about one of its foci, are placed in contact in such a way that…

Illustration of the rolling of equal hyperbolas. If two equal hyperbolas are placed so that the distances…

Illustration of the rolling of equal parabolas. "The two parabolas may be considered as two ellipses…

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.

"Friction-cones. a and b, cones; c, fork. In machinery, a form of friction-coupling consisting of two…

"Of all the contrivances for regulating the motion of machinery, this is said to be the most effectual.…

Illustration showing how a rolling logarithmic spiral can be constructed by taking successive values…

Illustration showing the rolling of two logarithmic spirals of equal obliquity.

"2 wheels revolving in contact, but in different planes, so as to transfer motion from one plane to…

"Device used to prove that all things fall at the same rate due to gravity. When the device is triggered,…

Illustration showing that the rolling of non-cylindrical surfaces. "If the angular velocity ratio of…

"Its mechanism may be understood by the means of the subjoined figure, B represents the end of the beam,…

"When the pendulum is drawn from its vertical position, the force of gravity, MG, is resolved into two…

"The motion of Saturn, Jupiter, and Mars with respect to Earth." — Encyclopedia Britanica, 1893

"Suppose a cannon be loaded with a ball, and placed on top of a tower, at such a height from the ground,…

"[This illustration] shows the path of a stone thrown obliquely from the hand. The propelling force…

"Thus, we have a cannon planted on a towwer at such a height that it would take four seconds for a ball…

"Suppose a, b, to be a marble floor, and c, to be an ivory ball, which has be thrown towards the floor…

"If the ball approaches the floor under a larger or smaller angle, its rebound will observe the same…

"... if a ball be thrown from F against the surface B C so as to strike it perpendicularly at A, it…

"The ball C is placed on a square frame between two upright wires, on each of which a ball slides so…

"We have an example of resultant motion in a boat which a person attempts to row north across a river,…

"Let, for instance, the force used by the boatman be twice as great as that of the tide. Then by the…

"Fleming's rule for direction of induced current. Extend the thumb, forefinger and middle finger of…

Illustration showing a section of the rolling surfaces by a plane perpendicular to their straight line…

"In machinery, the system of shafts which connects machinery with the prime mover, and through which…

In this illustration, "the driven surface of the slide coincides with the tangent to the spiral, the…