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A type of Ganoid fish. Ganoid is an order of fishes included seven living genera, whose members are all found in fresh water. The members of these genera are distinguished from their nearest allies, the teleosteans, or bony fish, by the presence of a spiral valve in the intestine, the fact that the tail is frequently heterocercal or unequally lobed, the skeleton often, at least in part, cartilaginous, and the skin furnished with bony scales or scutes (ganoid scales). This particular type (Acipenser) is a Sturgeon.

Acipenser Sturio

A type of Ganoid fish. Ganoid is an order of fishes included seven living genera, whose members are…

The Seal of the District of Alaska, 1911. The image on the seal shows Alaska's mountains and shore.

Seal of Alaska

The Seal of the District of Alaska, 1911. The image on the seal shows Alaska's mountains and shore.

The Amazon River is the largest, most voluminous river on earth, having a greater total flow than the next six largest rivers combined.

Amazon River

The Amazon River is the largest, most voluminous river on earth, having a greater total flow than the…

A type of Ganoid fish. Ganoid is an order of fishes included seven living genera, whose members are all found in fresh water. The members of these genera are distinguished from their nearest allies, the teleosteans, or bony fish, by the presence of a spiral valve in the intestine, the fact that the tail is frequently heterocercal or unequally lobed, the skeleton often, at least in part, cartilaginous, and the skin furnished with bony scales or scutes (ganoid scales). This particular species is a Bow-fin.

Amia Occidentalis

A type of Ganoid fish. Ganoid is an order of fishes included seven living genera, whose members are…

An illustration of a freshwater aquarium.

Freshwater Aquarium

An illustration of a freshwater aquarium.

An illustration of a saltwater aquarium.

Saltwater Aquarium

An illustration of a saltwater aquarium.

"An aquarium well filled and stocked with plants, fish, etc., is one of the finest ornaments one can have in the room."—Heinrich, 1887

The Aquarium

"An aquarium well filled and stocked with plants, fish, etc., is one of the finest ornaments one can…

"Aqueduct of Segovia, Spain. A conduit or channel for conducting water from one place to another."-Whitney, 1902

Aqueduct

"Aqueduct of Segovia, Spain. A conduit or channel for conducting water from one place to another."-Whitney,…

"A conduit for conveying water more particularly applied to structures for conveying water from distant sources for the supply of large cities." — Williams, 1889

Aqueduct

"A conduit for conveying water more particularly applied to structures for conveying water from distant…

"Part of a Roman Aqueduct. Aqueducts form one of the most characteristic features of Roman architecture. Although these simple successions of gigantic arches, which stretch for miles, have no pretensions to artistic beauty, yet their wonderful size and extent bear witness to the vast conceptions of Roman genius."

Roman Aqueduct

"Part of a Roman Aqueduct. Aqueducts form one of the most characteristic features of Roman architecture.…

"A machine for raising water, said to have been invented by Archimedes, during his stay in Egypt for draining and irrigating the land." — Chambers' Encyclopedia, 1875

Archimedes Screw

"A machine for raising water, said to have been invented by Archimedes, during his stay in Egypt for…

"Invented to raise water. A hollow tube wound spirally around a solid cylinder. As the cylinder is turned, water is fed up through the hollow tube and discharged at the top of the tube." —Quackenbos 1859

Archimedes' Screw

"Invented to raise water. A hollow tube wound spirally around a solid cylinder. As the cylinder is turned,…

"It consists of a tube, made of lead, or strong leather, coiled round a cylinder of wood or iron, as represented..." -Comstock 1850

Archimedes' Water Screw

"It consists of a tube, made of lead, or strong leather, coiled round a cylinder of wood or iron, as…

Artesian Wells differ from ordinary wells in that their waters are discharged by natural pressures on their reservoirs, so that pumping is not necessary to raise the water Such wells are therefore true springs.

Artesian Well

Artesian Wells differ from ordinary wells in that their waters are discharged by natural pressures on…

"Atolls. A coral island commonly consists of a narrow rim of reef, surrounding a lagoon." -Dana, 1880

Coral Island of Atoll

"Atolls. A coral island commonly consists of a narrow rim of reef, surrounding a lagoon." -Dana, 1880

"represents a section of an island, from the ocean (o) to the lagoon (l). On the ocean side, from o to a, there is shallow water for some distance out; and where not too deep, the bottom is covered here and there with growing corals. Between a and b there is a platform of coral rock, mostly bare at low tide, but covered at high ... b to d is the wooded portion of the island. The whole width (is) from the beach (b) to the lagoon (c)." -Dana, 1880

Section of Coral Island of an Atoll

"represents a section of an island, from the ocean (o) to the lagoon (l). On the ocean side, from o…

"And Jesus when he was baptized, went up straightway from the water: and lo, the heavens were opened unto him, and he saw the Spirit of God descending as a dove, and coming upon him; and lo, a voice out of the heavens, saying, This is my beloved Son, in whom I am well pleased." Matthew 3:16-17 ASV <p>Illustration of Jesus kneeling next to John the Baptist. A ray of light, the spirit of God, descends from a dove onto Jesus' head. There is a cloud behind the dove. John the Baptist, dressed in animal skins and holding a staff with a banner that reads "Agnus", is standing next to Jesus.

The Spirit of God Descends on Jesus When He is Baptized by John the Baptist

"And Jesus when he was baptized, went up straightway from the water: and lo, the heavens were opened…

This illustration shows the baptismal font at Claverly in England.

Baptismal Font at Claverly

This illustration shows the baptismal font at Claverly in England.

This illustration shows the baptismal font at Eastdown in England. It is made of stone and wood.

Baptismal Font at Eastdown

This illustration shows the baptismal font at Eastdown in England. It is made of stone and wood.

This illustration shows the baptismal font at Keysoe, c. 1200.

Baptismal Font at Keysoe

This illustration shows the baptismal font at Keysoe, c. 1200.

This illustration shows the baptismal font at Lydbury North in England.

Baptismal Font at Lydbury North

This illustration shows the baptismal font at Lydbury North in England.

This illustration shows the baptismal font at Smithfield, London, England.

Baptismal Font at Smithfield

This illustration shows the baptismal font at Smithfield, London, England.

This illustration shows the baptismal font at Tidenham, near Chepstow, in England.

Baptismal Font at Tidenham

This illustration shows the baptismal font at Tidenham, near Chepstow, in England.

This illustration shows the baptismal font at Wistanstow in England.

Baptismal Font at Wistanstow

This illustration shows the baptismal font at Wistanstow in England.

"Suppose a to be a long tube, with the piston b so nicely fitted to its inside, as to work air tight. If the lower end of the tube be dipped into water, and the piston drawn up by pulling at the handle c, the water will follow the piston so closely, as to be in contact with its surface, and apparently to be drawn up by the piston, as though the whole was one solid body. If the tube be thirty-five feet long, the water will continue to follow the piston, until it comes to the height of about thirty-three feet, where it will stop, and if the piston be drawn up still farther, the water will not follow it, but will remain stationary, the space from this height between the piston and the water, being left a void space or vacuum." &mdash;Comstock, 1850

Barometer

"Suppose a to be a long tube, with the piston b so nicely fitted to its inside, as to work air tight.…

A water barrel.

Water Barrel

A water barrel.

An illustration depicting Native American water vessels: A. Iroquois vessel of birchbark. B. Zuni woven water bottle. C. Hauasupai boiling basket

Native American Baskets

An illustration depicting Native American water vessels: A. Iroquois vessel of birchbark. B. Zuni woven…

"The bean with its roots in unboiled water will grow for a considerable time, as long as the mineral matter in the water will provide it with food materials. The roots of the plant in the boiled water will quickly die and the whole plant will then wither, because the roots no longer send the water up to the leaves." — Ritchie, 1918

Bean Plant in Jar

"The bean with its roots in unboiled water will grow for a considerable time, as long as the mineral…

A nocturnal, semi-aquatic rodent.

Beavers

A nocturnal, semi-aquatic rodent.

"A, Dytiscus Marginalis, or great Water-beetle; B, larva." &mdash; Chambers' Encyclopedia, 1875

Great Diving Beetle

"A, Dytiscus Marginalis, or great Water-beetle; B, larva." — Chambers' Encyclopedia, 1875

Predaceous diving beetles is a family of water beetles. They are about 25 mm (one inch) long on average, though there is much variation between species. Dytiscus latissimus, the largest, can grow up to 45 mm long. Most are dark brown, blackish or dark olive in color with golden highlights in some subfamilies. They have short, but sharp mandibles. Immediately upon biting they deliver digestive enzymes. The larvae are commonly known as water tigers. The family has not been comprehensively cataloged since 1920, but is estimated to include about 4,000 species in over 160 genera.

Predaceous Beetle

Predaceous diving beetles is a family of water beetles. They are about 25 mm (one inch) long on average,…

"Water Beetles are beetles which live on or in the water. The Dytiscus, common in stagnant water, is olive-green above, and oval in shape. The respiratory organs of the perfect insect are not adapted to obaining air from the water; it comes occasionally to the surface of the water for air, where it lies on its back, the openings of its air tubes in the last segment of the abdomen, being exposed."&mdash;(Charles Leonard-Stuart, 1911)

Water Beetle

"Water Beetles are beetles which live on or in the water. The Dytiscus, common in stagnant water, is…

Water beetles carry air bubbles under their abdomens, which provides an air supply. Water beetle larvae dwell at the bottom of ponds.

Water Beetle Larva

Water beetles carry air bubbles under their abdomens, which provides an air supply. Water beetle larvae…

Bird in the water

Bird

Bird in the water

Abandoned boat with a boy in it.

Boat

Abandoned boat with a boy in it.

A lateen-sail is a triangular sail extended on a yard which is slung one quarter from the lower end to a mast, and rigged in such a way that the upper end is raised in the air, and the lower end is brought down to form the tack. The word is merely a corruption of "latin," and the rig is mainly used in the Mediterranean and on sailing canoes and small boats.

Boat with Lateen-sail

A lateen-sail is a triangular sail extended on a yard which is slung one quarter from the lower end…

A steam ship that aids in daily transportation.

Steam Boat

A steam ship that aids in daily transportation.

A corked bottle with a tube, spouting a stream of water.

Spouting bottle

A corked bottle with a tube, spouting a stream of water.

A type of small overflow dam.

Weir Box

A type of small overflow dam.

An illustration of a young boy sitting on a stool watching a tea kettle in a fireplace.

Boy Watching Tea Kettle in Fireplace

An illustration of a young boy sitting on a stool watching a tea kettle in a fireplace.

Four boys and their dog rowing a small boat to the shore.

Boys Rowing a Boat

Four boys and their dog rowing a small boat to the shore.

"In 1629 Giovanni Branca, an Italian, contrived a machine which was employed for the various purposes of raising water, of sawing timber and pounding materials. His machine consisted of a wheel furnished with flat vanes around its circumference, like the boards of a paddle-wheel. Upon these vanes, steam was propelled from a close vessel, called an eolipile. A rotary motion was produced, and communicated to appropriate machinery. The results, however, of these and other discoveries made about this period, have never been rendered applicable to the purposes for which the modern steam engine is adapted." &mdash;Comstock, 1850

Brancas Engine

"In 1629 Giovanni Branca, an Italian, contrived a machine which was employed for the various purposes…

"In this water, instead of passing over, or entirely under the wheel, is delievered in the direction of its centre. This is one of the most common wheels, and is employed where there is not a sufficient fall for the construction of the overshot kind." -Comstock 1850

Breast Wheel

"In this water, instead of passing over, or entirely under the wheel, is delievered in the direction…

"Water enters the wheel halfway up and flows against the slots on the wheel. The wheel rotates with the flow of the water and the stream continues out the bottom of the wheel." &mdash;Quackenbos 1859

Breast Wheel

"Water enters the wheel halfway up and flows against the slots on the wheel. The wheel rotates with…

"A wheel turned by the force of water which is level with its centre." &mdash; Williams, 1889

Breast-wheel

"A wheel turned by the force of water which is level with its centre." — Williams, 1889

The Brook is an engraving on a wood block that was created by Edward Calvert, an English printmaker during the 19th century. It shows two ladies taking water out of a brook with their urns.

The Brook

The Brook is an engraving on a wood block that was created by Edward Calvert, an English printmaker…

This Assyrian bucket is designed with a cord handle and terminates at the bottom with a lion mask. It was used to transport water.

Assyrian Bucket

This Assyrian bucket is designed with a cord handle and terminates at the bottom with a lion mask. It…

This Graeco-Italic bucket is made out of bronze. It has a ring foot bottom with two hoop handles. It was used to transport water.

Graeco-Italic Bucket

This Graeco-Italic bucket is made out of bronze. It has a ring foot bottom with two hoop handles. It…

This Graeco-Italic bucket is made out of bronze. It has a ring foot bottom with a hoop handle. It was used to transport water.

Graeco-Italic Bucket

This Graeco-Italic bucket is made out of bronze. It has a ring foot bottom with a hoop handle. It was…

This Graeco-Italic bucket is made out of bronze. It has a ring foot bottom with two hoop handles. It was used to transport water.

Graeco-Italic Bucket

This Graeco-Italic bucket is made out of bronze. It has a ring foot bottom with two hoop handles. It…

This Graeco-Italic bucket is made out of bronze. It has a footless bottom resembling an inverted egg. It was used to transport water.

Graeco-Italic Bucket

This Graeco-Italic bucket is made out of bronze. It has a footless bottom resembling an inverted egg.…

Buffalo Harbor, from the Breakwater.

Buffalo Harbor

Buffalo Harbor, from the Breakwater.

The Domestic Water Buffalo or Domestic Asian Water buffalo (Bubalus bubalis) is abundant in Asia, and widely used in South America, southern Europe and elsewhere. It is a large ungulate and a member of the bovine subfamily. There are established feral populations in northern Australia but the dwindling true wild populations are thought to survive in India, Nepal, Bhutan and Thailand. All the domestic varieties and breeds descend from one common ancestor, the wild Asian water buffalo, which is now an endangered species.

Domestic Water Buffalo

The Domestic Water Buffalo or Domestic Asian Water buffalo (Bubalus bubalis) is abundant in Asia, and…

A species of bug that have aquatic habits.

Water Bug

A species of bug that have aquatic habits.

A type of Ganoid fish. This particular species is a Reed fish.

Calamoichthys Calabaricus

A type of Ganoid fish. This particular species is a Reed fish.

Canals used during ancient Babylonian times.

Ancient Babylonian Canals

Canals used during ancient Babylonian times.

Capillarity. On the left, water is higher in the smaller tubes due to adhesion. On the right, mercury has the opposite effect because of its cohesive properties.

Capillarity

Capillarity. On the left, water is higher in the smaller tubes due to adhesion. On the right, mercury…

"b is a glass tube in water and c is a glass tube in mercury. The surface of the water in the tube b is concave, while the surface of the mercury in the tube c is convex." &mdash; Hallock, 1905

Capillary Attraction

"b is a glass tube in water and c is a glass tube in mercury. The surface of the water in the tube b…

"Cardinal de Richelieu Towing Cinq-Mars and de Thou. From the painting by Paul Delaroche." -Rees, 1894

Cardinal de Richelieu Towing Cinq-Mars and de Thou

"Cardinal de Richelieu Towing Cinq-Mars and de Thou. From the painting by Paul Delaroche." -Rees, 1894

An illustration of a centaur and man standing on the shore of a lake.

Centaur & Man Standing on Shore

An illustration of a centaur and man standing on the shore of a lake.