Geysers are boiling springs which, at intervals more or less regular, shoot out huge columns of water with great violence.

Geyser in Eruption

Geysers are boiling springs which, at intervals more or less regular, shoot out huge columns of water…

Gulliver trying to get to shore after his shipwreck.

Giant in the sea

Gulliver trying to get to shore after his shipwreck.

This illustration shows the gills (breathing apparatus) of a perch, as well as the specific veins and arteries running along the branchial arch.

Gills (Branchial Arch of Perch)

This illustration shows the gills (breathing apparatus) of a perch, as well as the specific veins and…

This illustration shows the thorax of a crayfish with a portion of the carapace removed to show the gills.

Gills (Crayfish)

This illustration shows the thorax of a crayfish with a portion of the carapace removed to show the…

This illustration shows a transverse section of a worm with external gills. Gills are the breathing organs of aquatic animals.

Gills (worm)

This illustration shows a transverse section of a worm with external gills. Gills are the breathing…

A gimbals is a contrivance designed to keep a marine compass, chronometer, lamp, or other instrument in the horizontal position on board ship, notwithstanding the rolling and pitching of the vessel. The instrument is suspended in the diametral axis of a ring, which is again suspended in the diametral axis of another ring, the two axes being at right angles to one another.
This illustration shows a gimbal joint.

Gimbals (Joint)

A gimbals is a contrivance designed to keep a marine compass, chronometer, lamp, or other instrument…

A girl looking at her reflection in the water.

Girl

A girl looking at her reflection in the water.

A backwoods girl

Girl

A backwoods girl

An illustration of a girl drinking from a cup.

Girl Drinking From Cup

An illustration of a girl drinking from a cup.

An illustration of a girl heating water in the stove in a tea kettle.

Girl Heating Water in Tea Kettle

An illustration of a girl heating water in the stove in a tea kettle.

A girl standing in the ocean crying while a crab looks at her.

Girl in Ocean

A girl standing in the ocean crying while a crab looks at her.

A little girl sitting in a hamock above water looking at a frog.

Girl Sitting In A Hamock

A little girl sitting in a hamock above water looking at a frog.

An illustration of a young girl watering a field of tulips.

Girl Watering Field of Tulips

An illustration of a young girl watering a field of tulips.

Girl outside with ducks

Girl with Ducks

Girl outside with ducks

Fisherman turned sea-god

Glaucus

Fisherman turned sea-god

"Suppose a to be a gravel hill, and b a strata of clay or rock, impervious to water. The fluid percolating through the gravel would reach the impervious strata, along which it would run until it found an outlet at c at the foot of the hill, where a spring would be formed." — Wells, 1857

Gravel Hill

"Suppose a to be a gravel hill, and b a strata of clay or rock, impervious to water. The fluid percolating…

The Great Crested Grebe (Lophæthyia cristata) is a fresh-water, migratory, diving bird of the family Podicipidæ. It has a duck-like body, brownish and white plumage, long neck, short wings, no tail, and large, flattened toes furnished with lobate membranes serving the purpose of webs. Most of its life is spent in fresh water  lakes and ponds, but in winter and during migration, it often resorts to the sea. It is an excellent diver. The nest is made of rushes and other aquatic plants and usually floats on the water, being loosely anchored to weeds and grass. It is found in nearly all parts of Europe and Asia.

Great Crested Grebe

The Great Crested Grebe (Lophæthyia cristata) is a fresh-water, migratory, diving bird of the family…

An outdoor scene

Great Outdoors

An outdoor scene

"In this foot each toe is provided with its swimming membrane; the membrane being closed when the foot is flexed, and expanded when the foot is extended."—Pettigrew, 1874

Foot of Grebe

"In this foot each toe is provided with its swimming membrane; the membrane being closed when the foot…

Also known as the horned grebe, dipper, water-witch, and hell-diver, the sclavonian grebe is common to both Europe and North America.

Sclavonian Grebe

Also known as the horned grebe, dipper, water-witch, and hell-diver, the sclavonian grebe is common…

An illustration of a group consisting of three females and one male playing in water.

Group Playing in Water

An illustration of a group consisting of three females and one male playing in water.

"Shows the twisted levers or screws formed by the wings of the gull."—Pettigrew, 1874

Sea Gull

"Shows the twisted levers or screws formed by the wings of the gull."—Pettigrew, 1874

"Hero's Machine. The generation of steam from water by the application of heat, and the mechanical force produced by this means, appear to have been understood at a very remote period; but their application to machinery devoted to the purposes of locomotion, is a discovery of recent date. The ingenious contrivances of early discoverers were devoted to objects of minor importance, as those of raising water and propelling smoke upwards." —Comstock, 1850

Hero's Machine

"Hero's Machine. The generation of steam from water by the application of heat, and the mechanical force…

"Hotbeds may be heated by means of either steam or hot water. They can be piped from the heater in a dwelling-house or greenhouse." — Baily, 1898

Pipe-heated hotbed

"Hotbeds may be heated by means of either steam or hot water. They can be piped from the heater in a…

A house set on the side of a lake.

Lakeside house

A house set on the side of a lake.

"An instrument called the hydrostatic bellows, also shows, in a striking manner, the great force of a small quantity of water, pressing in a perpendicular direction. This instrument consists of two boards, connected together with strong leather, in the manner of the common bellows. It is then furnished with a tube a, which communicated between the two boards. A person standing on the upper board may raise himself up by pouring water into the tube. If the tube holds an ounce of water, and has an area equal to a thousandth part of the area of the top of the bellows, one ounce of water in the tube will balance a thousand ounces placed on the bellows." —Comstock, 1850

Hydraulic Bellows

"An instrument called the hydrostatic bellows, also shows, in a striking manner, the great force of…

Machine for raising water, and depending for its action on the impulse of flowing water.

Hydraulic Ram

Machine for raising water, and depending for its action on the impulse of flowing water.

"The hydraulic ram uses alternating water pressure, air pressure, and suction to provide a steady stream of water through the delivery pipe, e." —Hallock 1905

Hydraulic Water Ram

"The hydraulic ram uses alternating water pressure, air pressure, and suction to provide a steady stream…

"Pumps water in bursts. Water enters pipe B and is forced into D then up the tube F. Any excess water in tube B exits through E." —Quackenbos 1859

Hydraulic Ram

"Pumps water in bursts. Water enters pipe B and is forced into D then up the tube F. Any excess water…

"Water jaw, <em>Hydria</em>" &mdash; The Delphian Society, 1913

Hydria

"Water jaw, Hydria" — The Delphian Society, 1913

"Water-jaw, <em>Hydria</em>." &mdash; The Delphian Society, 1913

Hydria

"Water-jaw, Hydria." — The Delphian Society, 1913

The Greek Hydria is used as a water-pot to carry water with from springs. Maidens carried it on their heads vertically when full and horizontally when empty.

Greek Hydria

The Greek Hydria is used as a water-pot to carry water with from springs. Maidens carried it on their…

This Greek Hydria has a Kalpis form that is smooth and painted in black and red figures on the shoulder. It is used as a water-pot to carry water from springs.

Greek Hydria

This Greek Hydria has a Kalpis form that is smooth and painted in black and red figures on the shoulder.…

This Greek Hydria is painted in black, reddish brown and white. Decorated of the highest class, the shoulder is decorated with an ivy band. It is used as a water-pot to carry water.

Greek Hydria

This Greek Hydria is painted in black, reddish brown and white. Decorated of the highest class, the…

"A mountain and spring, showing how the principle of the syphon operates to produce the effect described. Suppose there is a crevice, or hollow in the rock from a to b, and a narrow fissure leading from it, in the form of the syphon, b c. The water from the rill fe, filling the hollow, up to the line a d, it will then discharge itself through the syphon, and continue to run until the water is exhausted down to the l g of the syphon b, when it will cease. Then the water from the rills continuing to run until the hollow is again filled up to the same line, the syphon again begins to act, and again discharges the contents of the reservoir as before, and thus the spring p, at one moment flows with great violence and the next moment ceases entirely." —Comstock, 1850

Intermitting Spring

"A mountain and spring, showing how the principle of the syphon operates to produce the effect described.…

Diagram illustrating an irrigation system.

Irrigation system

Diagram illustrating an irrigation system.

The Egyptian Krater is an antique vase that has a lotus cup design. Typically used for mixing water and wine.

Egyptian Krater

The Egyptian Krater is an antique vase that has a lotus cup design. Typically used for mixing water…

This Egyptian Krater is an antique vase that was found in Thebes, Ancient Egypt during the eighteenth dynasty. Typically used for mixing water and wine.

Egyptian Krater

This Egyptian Krater is an antique vase that was found in Thebes, Ancient Egypt during the eighteenth…

An image of a lake in a town.

Lake

An image of a lake in a town.

A type of Ganoid fish. This particular species is a gar-pike.

Lepidosteus Occeus

A type of Ganoid fish. This particular species is a gar-pike.

The Liberty Bell above the shore.

Liberty Bell

The Liberty Bell above the shore.

Lighthouse in the water.

Lighthouse

Lighthouse in the water.

"A tower or other elevated structure bearing a light at the top and erected at the entrance of a harbor or on some rock or headland to serve as a guide or warning of danger to navigators at night." -Foster, 1921

Lighthouse

"A tower or other elevated structure bearing a light at the top and erected at the entrance of a harbor…

A little girl on a sail boat holding onto the main sail.

Little Girl Sailing

A little girl on a sail boat holding onto the main sail.

"The lock C is a controllable compartment with raise-able and lower-able gates D and E. Since water always finds its level, by raising and lowering the gates, two separate water levels can be maintained and still provide water transportation through the lock." &mdash;Quackenbos 1859

Locks

"The lock C is a controllable compartment with raise-able and lower-able gates D and E. Since water…

Loreley, a water fairy, rides her chariot drawn by two goldfish. She was a siren, singing and distracting fishermen, until she fell in love with one of them.

Loreley in her Chariot

Loreley, a water fairy, rides her chariot drawn by two goldfish. She was a siren, singing and distracting…

An illustration of a man carrying water to his wagon.

Man and Wagon

An illustration of a man carrying water to his wagon.

An illustration of a man canoeing down a river.

Man Canoeing

An illustration of a man canoeing down a river.

An illustration of a man drenched with water.

Man Drenched with Water

An illustration of a man drenched with water.

A man drinking water from a well.

Man drinking from well

A man drinking water from a well.

An illustration of a man standing in knee deep water filling a water pitcher.

Man Filling Pitcher in Lake

An illustration of a man standing in knee deep water filling a water pitcher.

An illustration of a man holding a child while wading in water.

Man Holding Child

An illustration of a man holding a child while wading in water.

Man selling water to woman in window.

Man Selling Water

Man selling water to woman in window.

An illustration of a man sitting on the shore of a lake and a child standing behind him pointing into to the water.

Man Sitting & Child Standing Near Lake

An illustration of a man sitting on the shore of a lake and a child standing behind him pointing into…

Manatees are large, fully aquatic marine mammals sometimes known as sea cows. The name manat&iacute; comes from the Ta&iacute;no, a pre-Columbian people of the Caribbean, meaning "breast".

Manatee on Shore

Manatees are large, fully aquatic marine mammals sometimes known as sea cows. The name manatí…

A boy by a marsh.

Marsh

A boy by a marsh.

A mill which grounds grain into flour. This flour mill is located on a body of water.

Floating Flour Mill

A mill which grounds grain into flour. This flour mill is located on a body of water.

"If an object is placed before a plane mirror, a virtual image appears behind the mirror. Each point of this image seems to be as far behind the mirror as the corresponding point of the object is in front of the mirror. Hence, images seen in still, clear, water are inverted." -Avery 1895

Plane Mirror

"If an object is placed before a plane mirror, a virtual image appears behind the mirror. Each point…

"...a certain amount of salt may be successfully dropped into a tumbler brim-full of water without causing it to overflow. The particles of water, which are supposed to be globular, do not everywhere touch each other, and the particles of salt are accommodated in the interstices between them." &mdash;Quackenbos 1859

Water with Salt Molecules

"...a certain amount of salt may be successfully dropped into a tumbler brim-full of water without causing…

Also known as the waterhen, the moorhen lives around rivers and lakes, feeding on worms, insects, mollusca, and seeds.

Moorhen

Also known as the waterhen, the moorhen lives around rivers and lakes, feeding on worms, insects, mollusca,…