"If an excited substance be brought near a ball made of pith, or cork, suspended by a silk thread, the ball will, in the first place, approach the electric, as at a, indicating an attraction towards it, and if the position of the electric will allow, the ball will come into contact with the electric, and adhere to it for a short time, and whill then recede from it, showing that it is repelled, as at b." -Comstock 1850

Electrical Attraction

"If an excited substance be brought near a ball made of pith, or cork, suspended by a silk thread, the…

"Courtney's Automatic Buoy. A, cylinder, 27 ft. 6 in. long; B, mooring shackle; C, rudder; D, buoy; E, diaphragm; F, ball valves; G, air inlet tubes; H, air (compressed) outlet tube to whistle; I, compressed air inlet to buoy; K, manhole; L, steps; N, whistle." —The Encyclopedia Britannica, 1910

Automatic Buoy

"Courtney's Automatic Buoy. A, cylinder, 27 ft. 6 in. long; B, mooring shackle; C, rudder; D, buoy;…

A baby and a ball

Baby

A baby and a ball

A baby and a ball

Baby

A baby and a ball

A design with a ball

Ball

A design with a ball

Woman exercising by tossing balls.

Ball Exercise

Woman exercising by tossing balls.

This image depicts a ball game during the summer in San Sebastian, Spain.

Ball Game

This image depicts a ball game during the summer in San Sebastian, Spain.

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one picture of which we are instructed that the loser was obliged to suffer another to ride on her back." — Goodrich, 1844

Egyptian ball game

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one…

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one picture of which we are instructed that the loser was obliged to suffer another to ride on her back." — Goodrich, 1844

Egyptian ball game

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one…

"The dredges on this pattern, used in Britain for ten years after their first introduction, about the year 1838, were usually small and rather heavy, not more than 12 to 15 inches in length, by 4 or 4.5 inches in width at the mouth. Two scrapers, the length of the dredge-frame, and 1.5 to 2 inches wide, were set at an angle of about 110 degrees to the plane of the dredge's mouth, so that when the dredge was gently hauled along it took hold of the ground and secured anything loose on its surface." — Encyclopedia Britannica, 1893

Ball's Naturalists' Dredge

"The dredges on this pattern, used in Britain for ten years after their first introduction, about the…

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one picture of which we are instructed that the loser was obliged to suffer another to ride on her back. Some of these identical balls have been found in the tombs at Thebes." — Goodrich, 1844

Egyptian ball

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one…

Any of various rounded, movable objects used in various athletic activities and games.

Golf Ball

Any of various rounded, movable objects used in various athletic activities and games.

"A ball-bearing hub with outward cups. The hub-shell H is turned out of mild steel, and the cups C are forced into the ends of the hub-shell and soldered thereto. A thin washer W is then spun into the end, for the purpose of retaining oil, and a thin internal tube T unites the two cups, and guides the oil fed in at the middle of the hub to the balls. The projecting flanges S are for the attachment of the tangent spokes used to build the hub into the wheel. The spindle A has the two cones screwed on it, one C, against the shoulder, the other C, adjustable. The-spindle ends are passed through the back-fork ends and are there adjusted in position by the chain-tension adjusters. After adjustments the nuts N clamp the spindle securely between the fork-ends. The chain-wheel or free-wheel clutch is screwed on the end of the hub-shell with a right-hand thread." — The Encyclopedia Britannica, 1910

Ball-bearing Hub

"A ball-bearing hub with outward cups. The hub-shell H is turned out of mild steel, and the cups C are…

Three balls.

Three Balls

Three balls.

a ball bearing is a type of rolling-element bearing which uses balls to maintain the separation between the moving parts of the bearing.

Ball Bearing

a ball bearing is a type of rolling-element bearing which uses balls to maintain the separation between…

A small bell inside of a glass sphere.

Bell in globe

A small bell inside of a glass sphere.

An illustration of bowling pins and a bowling ball.

Bowling

An illustration of bowling pins and a bowling ball.

A boy playing baseball.

Boy playing baseball

A boy playing baseball.

Boys playing ball.

Boys playing ball

Boys playing ball.

A cat in a ball

Cat in a ball

A cat in a ball

"When a ball is rolling on a horizontal plane, the centre of gravity is not raised, but moves in a straight line, parallel to the surface of the plane on which it rolls, and is consequently always directly over its centre of gravity." -Comstock 1850

Center of Gravity of a Rolling Ball

"When a ball is rolling on a horizontal plane, the centre of gravity is not raised, but moves in a straight…

"If the plane is inclined downwards, the ball is instantly thrown into motion, because the centre of gravity then falls forward of that motion, or the point on which the ball rests." -Comstock 1850

Center of Gravity of a Ball Rolling on an Incline

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

"Suppose a cannon ball, tied with a string to the centre of a slab of smooth marble, and suppose an attempt be made to push this ball with the hand in the direction of b; it is obvious that the string would prevent its going to that point; but would keep it in thei circle. n this case, the string is the centripedal force." -Comstock 1850

Centrifugal Force

"Suppose a cannon ball, tied with a string to the centre of a slab of smooth marble, and suppose an…

"Attach a ball, for instance, to a cord; and , fastening the end of the cord at a point, O, give a quick impulse to the ball. It will be found to move in a circle, ABCD, because the cord keeps it within a certain distance of the centre (sic). Were it not for this, it would move in a straight line." —Quackenbos 1859

Centrifugal Force

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

Children playing with a ball and hoop.

Children Playing

Children playing with a ball and hoop.

Two children playing a game with a ball.

Children Playing

Two children playing a game with a ball.

"Two balls after an inelastic collision." —Quackenbos 1859

Inelastic Collision

"Two balls after an inelastic collision." —Quackenbos 1859

"One of the best-known instruments of this [electrometer] class is Coulomb's torsion-balance, which consists essentially of gilt ball, i, carried at the end of a horizontal shellac needle that is suspended by a fine silver wire from the top of a tube that rises from the cover of the enclosing glass cylinder. A vertical insulating rod passing through the cover carries a handle, a, and a gilt ball, e, at its ends." -Avery 1895

Coulomb's Torsion-Balance

"One of the best-known instruments of this [electrometer] class is Coulomb's torsion-balance, which…

Man demonstrating the cut.

Cricket

Man demonstrating the cut.

The bowler.

Cricket

The bowler.

Man demonstrating the drive.

Cricket

Man demonstrating the drive.

The wicket-keeper.

Cricket

The wicket-keeper.

Cricket game.

Cricket

Cricket game.

The buffle-headed duck builds its nest in the hollow of trees, and averages about thirteen inches in length. It is also known as the spirit duck, little dipper, butter-box, and butter-ball.

Buffle-Headed Duck

The buffle-headed duck builds its nest in the hollow of trees, and averages about thirteen inches in…

"One of the simplest instruments of this kind consists of a metallic needle, terminated at each end by a light pith-ball, which is covered with gold leaf, and supported horizontally at its centre by a fine point.." -Comstock 1850

Electroscope

"One of the simplest instruments of this kind consists of a metallic needle, terminated at each end…

Dribbling.

Football

Dribbling.

The drop kick.

Football

The drop kick.

Football game.

Football

Football game.

A young girl seated in front of a fishbowl, with a book and toys nearby.

Girl and fishbowl

A young girl seated in front of a fishbowl, with a book and toys nearby.

Inauguration ceremony for General Grant for his second term as President.

Grant's Second Inauguration as President

Inauguration ceremony for General Grant for his second term as President.

"That the cannon ball is capable of attracting as well as being attracted, may be proved by suspending two balls close to each other by very long cords. In consequence of their attraction, the cords will not hang parallel, but will incline towards each other as they descend...." —Quackenbos 1859

Gravity Proved by Cannon Balls

"That the cannon ball is capable of attracting as well as being attracted, may be proved by suspending…

A hand dropping a small lead ball.

Hand and ball

A hand dropping a small lead ball.

"It is composed of a hollow ball of glass, or metal, with a graduated scale rising from its upper part, which serves to balance it in the fluid." -Comstock 1850

Hydrometer

"It is composed of a hollow ball of glass, or metal, with a graduated scale rising from its upper part,…

This is an illustration of a baseball game. Baseball is played on a large field that has four bases laid out in a square, positioned like a diamond, whose outlines mark the course a runner must take to score. Teams alternate positions as batters and fielders, exchanging places when three members of the batting team are put out. Batters try to hit a pitched ball out of reach of the fielding team and complete a circuit around the bases in order to score a run.

Baseball Game Illustration

This is an illustration of a baseball game. Baseball is played on a large field that has four bases…

"On the top of a short pillar is placed a card, and on the card a brass bal. Beside the pillar is fixed a steel spring, with an apparatus for drawing it back. If the spring is drawn back and the suddenly released, it will drive the card from the top of the pillar, while the ball in consequence of its inertia will retain its place." —Quackenbos 1859

Inertia Demonstration

"On the top of a short pillar is placed a card, and on the card a brass bal. Beside the pillar is fixed…

An illustration of a jester chasing a ball.

Jester Chasing Ball

An illustration of a jester chasing a ball.

"Lapidary's Dial. A, section; B, side elevation; a, a, jaws; b, ball; c, tube; d, dial; e, cement rod; f, index; g, quadrant." —The Encyclopedia Britannica, 1910

Lapidary's dial

"Lapidary's Dial. A, section; B, side elevation; a, a, jaws; b, ball; c, tube; d, dial; e, cement rod;…

The old courthouse in New London, Connecticut.

The Old Courthouse of New London

The old courthouse in New London, Connecticut.

"A pendulum consists of a heavy ball suspended in such a way as to swing to and fro." —Quackenbos 1859

Pendulum

"A pendulum consists of a heavy ball suspended in such a way as to swing to and fro." —Quackenbos…

"From a cross piece, A, on a stout framework, a heavy block of wood, B, is suspended, in such a way as to move freely backward and forward. A ball fired into this block will drive it back to a distance proportioned to the ball's velocity. All other things being known, the ball's velocity can be discovered." —Quackenbos 1859

Ballistic Pendulum

"From a cross piece, A, on a stout framework, a heavy block of wood, B, is suspended, in such a way…

"Suppose a cannon be loaded with a ball, and placed on top of a tower, at such a height from the ground, that it would take just three seconds for the ball to descend from it to the ground, if let fall perpendicularly. Now, suppose the cannon to be fired in an exact horizontal direction, and at the same instant, the ball to be dropped towards the ground. They will both reach the ground at the same instant..." -Comstock 1850

Projectile Motion of a Cannonball

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

"Thus, we have a cannon planted on a towwer at such a height that it would take four seconds for a ball to fall from it to the ground. Dropped from the cannon's mouth, in the first second a ball would reach A; in the next, B; in the third, C; and in the fourth D." —Quackenbos 1859

Projectile Motion of a Cannon Ball

"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 in the direction of the line c e; it will rebound in the direction of the line e d, thus making the two angles f and g exactly equal." -Comstock 1850

Reflected Motion

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

"... if a ball be thrown from F against the surface B C so as to strike it perpendicularly at A, it will return in the line A F. If thrown from D however, it will glance off on the other side of the perpendicular, at the same angle, to E." —Quackenbos 1859

Reflected Motion

"... 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 as to strike C when it descends. Let the ball A drop, and it will drive C to D... Let the ball B drop, and it will drive C to E; this is simple motion. Let A and B drop at the same instant, and they will drive C to F; this is resultant motion." —Quackenbos 1859

Resultant Motion with Ball

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

"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…

"Bezant, Or. BESANT, or BEZANT. Gold coin of Byzantium; when they appear in a coat of arms their colour is not described: a besant is always or." -Hall, 1862

Roundlet Bezant

"Bezant, Or. BESANT, or BEZANT. Gold coin of Byzantium; when they appear in a coat of arms their colour…

"Golpe, purpure. GOLPS. Roundlets of a purple tincture. The colour is not stated, as the name denotes the colour." -Hall, 1862

Roundlet Golpe

"Golpe, purpure. GOLPS. Roundlets of a purple tincture. The colour is not stated, as the name denotes…

"Guzes, sanguine. In addition to the foregoing tinctures, there are nine roundlets or balls used in Armory, the names of which are sufficient to denote their colour without expressing the same." -Hall, 1862

Roundlet Guzes

"Guzes, sanguine. In addition to the foregoing tinctures, there are nine roundlets or balls used in…