ClipArt ETC
In the story of Balin and Balan, the image depicts the damsel removing her mantle in front of King Arthur and his followers.

The Damsel Let Fall Her Mantle

In the story of Balin and Balan, the image depicts the damsel removing her mantle in front of King Arthur…

A cartoon image showing some soldiers on horses running to attack a castle.

The Fight

A cartoon image showing some soldiers on horses running to attack a castle.

In the short story of Geraint and Enid, the image depicts Geraint listening to Enid singing.

Geraint Hears Enid Singing

In the short story of Geraint and Enid, the image depicts Geraint listening to Enid singing.

In the short story of The Holy Grail, the image depicts the character of Sir Galahad.

Sir Galahad

In the short story of The Holy Grail, the image depicts the character of Sir Galahad.

In the short story of The Holy Grail, the image depicts the ship arriving at the city of Sarras.

The Ship Approaches the City of Sarras

In the short story of The Holy Grail, the image depicts the ship arriving at the city of Sarras.

In the short story of The Arickara Indians, the image depicts the return of the Indian warriors on horses.

The Return of the Warriors

In the short story of The Arickara Indians, the image depicts the return of the Indian warriors on horses.

A scene from the Middle Ages, in which two people are plowing their land. One drives the oxen with a whip, while the other guides the plow. The original image is from a 14th century manuscript.

Plowing in the Middle Ages

A scene from the Middle Ages, in which two people are plowing their land. One drives the oxen with a…

An image showing the process of picking cotton and then loading it upon merchant ships.

Picking and Loading Cotton

An image showing the process of picking cotton and then loading it upon merchant ships.

An image depicting the coffin used for mummies in ancient Egypt.

Mummy and Cover of Coffin

An image depicting the coffin used for mummies in ancient Egypt.

An image of a mastiff and pug, two breeds of dogs.

Mastiff and Pug

An image of a mastiff and pug, two breeds of dogs.

An ancient Assyrian wall relief, depicting the symbol of a winged bull with the head of a human male.

Winged Bull

An ancient Assyrian wall relief, depicting the symbol of a winged bull with the head of a human male.

A banner, featuring two angels and a face in the middle of the image.

Angelic Banner

A banner, featuring two angels and a face in the middle of the image.

Lilium parvum is native to the Sierra Nevada mountains of California. The flowers bloom in June and early July. The bulbs are usually more clustered more tightly than indicated in the image.

Lilium Parvum

Lilium parvum is native to the Sierra Nevada mountains of California. The flowers bloom in June and…

Virginian cowslip and bluebells are the common names of <i>mertensia virginica</i>. The flowers are usually drooping more than the image indicates.

Virginian Cowslip

Virginian cowslip and bluebells are the common names of mertensia virginica. The flowers are usually…

The left image is a staminate catkin of Russian mulberry. The right image is a pistilate catkin.

Russian Mulberry Catkins

The left image is a staminate catkin of Russian mulberry. The right image is a pistilate catkin.

The left image is a staminate flower of Russian mulberry. The right image is a pistilate flower.

Russian Mulberry Flower

The left image is a staminate flower of Russian mulberry. The right image is a pistilate flower.

An image of a wind-powered sailboat. This sort of sailboat was developed in the 19th century for faster delivery of trade goods from one nation to another.

Wind-Powered Sailboat

An image of a wind-powered sailboat. This sort of sailboat was developed in the 19th century for faster…

The first image is of clamps used in chemistry labs to hold test tubes and other apparatuses. The second image is of a stand that one would place small samples or liquids in order to measure them with greater accuracy.

Lab Clamps

The first image is of clamps used in chemistry labs to hold test tubes and other apparatuses. The second…

An image of a graduate that is used to measure chemicals.

Chemical Graduate

An image of a graduate that is used to measure chemicals.

An image of a balance used in chemistry labs to measure small objects. This diagram details how one might build a balance.

Simple Balance

An image of a balance used in chemistry labs to measure small objects. This diagram details how one…

Image of a typical alcohol lamp

Alcohol Lamp

Image of a typical alcohol lamp

This image is of a strain insulator and turnbuckle which is used for trolley wire. A strain insulator is able to withstand the tension of the wire. This device helps support the trolley wire. A turnbuckle adjusts the tension accordingly. A turnbuckle is often used for corners of a wresting arena.

Trolley Support

This image is of a strain insulator and turnbuckle which is used for trolley wire. A strain insulator…

Image of a Westinghouse circuit breaker. Around the time of the publication of the book (1901), large numbers were in use and gave very good service. a and b are the main contacts. c is the crosspiece that a and b are connected to. The current flows from a to c to b, which trips the coil d and exits out l. m is an auxiliary carbon contact, n is a carbon wiper, and w is an adjustable weight attached to the armature.

Circuit Breaker

Image of a Westinghouse circuit breaker. Around the time of the publication of the book (1901), large…

A motor-driven booster made by the General Electric Company. A booster is a motor generator (MG) set that regulates voltage in DC circuits. M is the shunt-wound motor, B is the series booster, and S is a shunt across the field of a booster. t is a switch

Motor-Driven Booster

A motor-driven booster made by the General Electric Company. A booster is a motor generator (MG) set…

An image of a right-hand frog, or overhead switch. Switches are used when a wire needs to branch off and merge into another wire.

Right-hand Frog

An image of a right-hand frog, or overhead switch. Switches are used when a wire needs to branch off…

An image of a protected bond. The curved bond is protected by the terminals, the railway proper of the trolley.The bond is designed to withstand tension created by contact with the trolley.

Rail Bond

An image of a protected bond. The curved bond is protected by the terminals, the railway proper of the…

An image of a 'single truck'. They have four wheels, a single motor on each axle, hold a trolley car. The motors are supported by bars b, which are supported by spring s. To prevent oscillation, extra springs S1 and S2 are added. The wheels are generally 30 to 33 inches in diameter.

Single Truck

An image of a 'single truck'. They have four wheels, a single motor on each axle, hold a trolley car.…

An image of a 'double truck'. This truck has everything that a single truck has (four equal size tires and a motor on each axis), but works in conjunction with a second truck to move the trolley. The trucks hold the trolley base and allow it to roll on the rails.

Double Truck

An image of a 'double truck'. This truck has everything that a single truck has (four equal size tires…

A typical circuit breaker that would have been used during the turn of the century. This image is an example of one that powered a trolley

Circuit Breaker

A typical circuit breaker that would have been used during the turn of the century. This image is an…

A squash seed with a peg. The peg helps the seed escape from its covering.

Squash Seed

A squash seed with a peg. The peg helps the seed escape from its covering.

Image of a young plant. R are the root hairs, C is a seed leaf, and L is a true leaf.

Young Plant

Image of a young plant. R are the root hairs, C is a seed leaf, and L is a true leaf.

An image of what a regular valley would look like if it were cut to make a plateau and lowlands.

Valley

An image of what a regular valley would look like if it were cut to make a plateau and lowlands.

Image of a Chinese version of the plow that was pushed forward with the chest.

Breast Plow

Image of a Chinese version of the plow that was pushed forward with the chest.

A soil crumb that has been tilled to reveal its particles. This is to show what the soil is made of.

Soil Crumb

A soil crumb that has been tilled to reveal its particles. This is to show what the soil is made of.

A geranium branch. Geraniums can come in a variety of different colors.

Geranium Branch

A geranium branch. Geraniums can come in a variety of different colors.

Image of a tree reaching for sunlight

Tree Branch

Image of a tree reaching for sunlight

The labeled anatomy of a cherry blossom.

Cherry Blossom

The labeled anatomy of a cherry blossom.

Inarching, also known as approach grafting, is used to join two plants that are otherwise very difficult to join together. The pieces are tied so that each individual piece has roots beneath it and growth above it. Inarching can also be used in pleaching, which is the technique of weaving tree branches into bushes for decorative purposes.

Approach Grafting

Inarching, also known as approach grafting, is used to join two plants that are otherwise very difficult…

Peach tree borer larva. This image is about twice the actual size. Also called the peach crown borer. From its name, it is a pest found in peaches and other stone fruit

Peach Borer

Peach tree borer larva. This image is about twice the actual size. Also called the peach crown borer.…

Image of an Argentine ant. This destructive insect is native to parts of South America, but was accidentally introduced to other countries including North America, Australia, Hawaii, Europe, Japan, New Zealand, and Easter Island. The smaller image is slightly smaller than its actual size.

Argentine Ant

Image of an Argentine ant. This destructive insect is native to parts of South America, but was accidentally…

Image A is of bacteria that needs air to grow. Image B is of bacteria that do not need air to grow.

Grown Bacteria

Image A is of bacteria that needs air to grow. Image B is of bacteria that do not need air to grow.

Sectional view of a sterilizing pail. Bottles are placed on the inverted pan on the bottom.

Sterilizing Pail

Sectional view of a sterilizing pail. Bottles are placed on the inverted pan on the bottom.

Various forms of cabbage. Top left: Jersey kale, bottom left: wild cabbage, right: Georgia collard. These images are drawn on the same scale.

Cabbage Plant

Various forms of cabbage. Top left: Jersey kale, bottom left: wild cabbage, right: Georgia collard.…

Image of a bucking bronco with a rider.

Bucking Bronco

Image of a bucking bronco with a rider.

Various breeds of dogs. Far left: St. Bernard, left: spaniel, right: dachshund, far right: greyhound.

Various Dog Breeds

Various breeds of dogs. Far left: St. Bernard, left: spaniel, right: dachshund, far right: greyhound.

Kinds of fowl. Far left: light Brahma, behind Brahma: bantam, middle: long-tailed oriental fowl, right: jungle fowl, etc.

Kinds of Fowl

Kinds of fowl. Far left: light Brahma, behind Brahma: bantam, middle: long-tailed oriental fowl, right:…

Sometimes it is not necessary for an entire wheel to be used. A projection of any kind that can cause an object to move in a circle may be considered a wheel, like in the image given.

Bucket and Crank

Sometimes it is not necessary for an entire wheel to be used. A projection of any kind that can cause…

A wedge is a moveable inclined plane that is used to move heavy materials short distances as shown in the image.

Simple Machine

A wedge is a moveable inclined plane that is used to move heavy materials short distances as shown in…

Friction is the tendency of a body to resist movement when it is being moved on a surface. The coefficient of friction is the ratio between the resistance of the motion and the perpendicular pressure between the surfaces as shown. P/W

Elementary Mechanics

Friction is the tendency of a body to resist movement when it is being moved on a surface. The coefficient…

Hydrostatics is a branch of hydrodynamics that deals with the statics of fluids that are usually combined to an equilibrium and pressure of liquids. Image a is a vessel with a wooden block of the same size and image b, which has the same dimensions as image a, is filled with water and has a depth the same length as the wooden block. The pressure per square inch would be 100/10 = 10

Hydromechanics

Hydrostatics is a branch of hydrodynamics that deals with the statics of fluids that are usually combined…

Water that is placed in an apparatus will have equal pressure if the pistons pushing on it push at the same time with the same frequency.

Hydromechanics

Water that is placed in an apparatus will have equal pressure if the pistons pushing on it push at the…

In image a, the pressure at the bottom is the same as the pressure at the top of the cylinder. If the area at the bottom and the depth of the liquid of image b is the same as image a, then the pressures will be the same for both.

Downward Pressure

In image a, the pressure at the bottom is the same as the pressure at the top of the cylinder. If the…

An image summarizing Pascal's law, which states that pressure of a liquid is equal in all directions provided that the pressure ratio is the same.

Pascal's Law

An image summarizing Pascal's law, which states that pressure of a liquid is equal in all directions…

Pressure upon an oblique surface. In the image, pressure acts on all sides of the surface equally.

Oblique Surfaces

Pressure upon an oblique surface. In the image, pressure acts on all sides of the surface equally.

If water is to be discharged and the inside edges are rounded and the tube is conical, then no contraction will take place.

Contracted Vein

If water is to be discharged and the inside edges are rounded and the tube is conical, then no contraction…

An air compressor. They come in many forms, most commonly in cylinder form - as shown. This image shows the inner workings of an air compressor

Air Compressor

An air compressor. They come in many forms, most commonly in cylinder form - as shown. This image shows…

A Cartesian diver. At the top of the jar is a rubber bulb filled with air. The figure inside the jar is made of glass and weighs less than an equal volume of water, so it will float. This image serves to illustrate the elasticity of air and the transference of pressure in all directions of the water.

Cartesian Diver

A Cartesian diver. At the top of the jar is a rubber bulb filled with air. The figure inside the jar…

Image of a locomotive from the front. E is the exhaust pipe, and S is the smokestack. T are tubes through which hot gases are expelled.

Locomotive Blast

Image of a locomotive from the front. E is the exhaust pipe, and S is the smokestack. T are tubes through…

This image is a centrifugal pump with one half of the casing removed. S is a hollow hub, a is a curved arm, also called a vane or wing, and are revolved with a high velocity of the arrow. The air between them is driven out by the discharge and pipe D. A centrifugal pump is a valuable instrument for raising water to enormous heights.

Centrifugal Pump

This image is a centrifugal pump with one half of the casing removed. S is a hollow hub, a is a curved…

Linear expansion is elongation (of an iron bar) in one direction. A is a metal rod, B is a screw, C is an eye, F is an indicator. As the rod heats, the elongation is shown by the indicator along D E.

Linear Expansion

Linear expansion is elongation (of an iron bar) in one direction. A is a metal rod, B is a screw, C…