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An illustration of a boy in a sailor suit waving.

Boy in Sailor Suit Waving

An illustration of a boy in a sailor suit waving.

An illustration of branch of mangrove; a, flowers; b, a flower laid open; c, pistil; d, trichoblast in bark highly magnified. Mangroves (generally) are trees and shrubs that grow in saline (brackish) coastal habitats in the tropics and subtropics. The word is used in at least three senses: (1) most broadly to refer to the habitat and entire plant assemblage or mangal, for which the terms mangrove swamp and mangrove forest are also used, (2) to refer to all trees and large shrubs in the mangal, and (3) narrowly to refer to the mangrove family of plants, the Rhizophoraceae, or even more specifically just to mangrove trees of the genus Rhizophora. Mangals are found in depositional coastal environments where fine sediments, often with high organic content, collect in areas protected from high energy wave action.

Branch of Mangrove

An illustration of branch of mangrove; a, flowers; b, a flower laid open; c, pistil; d, trichoblast…

Telegraphy is the long distance transmission of written messages without physical transport of letters. A telegraph is a device for transmitting and receiving messages over long distances.

The Inner Workings of Telegraphy

Telegraphy is the long distance transmission of written messages without physical transport of letters.…

Wave motors were machines designed and built in the late 19th and early 20th century to harness the power of wave or tidal energy. The earliest wave motors were not intended for the creation of electricity. Prior to 1880, wave motors were designed to operate non electrically to power vehicles, mills, flush sewers, clean streets and conserve fresh water

Wave Motor

Wave motors were machines designed and built in the late 19th and early 20th century to harness the…

A diagram demonstrating the motion a frog makes whilst swimming. In this stage of the frog's life, the frog makes waved lines while moving through the water.

Swim Lines of Frog

A diagram demonstrating the motion a frog makes whilst swimming. In this stage of the frog's life, the…

An Image of an esophagus showing how a mass of food, or bolus, passes through the esophagus into the stomach. The tissue in front is relaxed, while the tissue behind the bolus is in contraction. When food is not going through it, the esophagus looks like the wave of contraction in the picture.

Human Esophagus

An Image of an esophagus showing how a mass of food, or bolus, passes through the esophagus into the…

Fucus is the generic name of various species of brown seaweed which form the main vegetation of rocky shores between tide marks. Most common of all is F. vesiculosus (Rockweed, Bladderweed, sea wave, etc.), easily distinguished by its entire edges and paired air vesicles. On account of the large proportion of ash it forms a valuable manure. Besides manure, the only direct chemical utilization of of the Fuci is for the preparation of Iodine. The vegetative body of Fucus is usually a thallus; the branching is dichotomous in one plane. Of the inner, or medullary, cells of the thallus, the outer wall becomes mucilaginous, while the less superficial of the rind cells develop filaments which grow inward, thus surrounding the inner cells within a network of filaments. The ladders are formed by the simple separation of portions of the tissue, the cavities becoming distended by air. Fertilization takes place when the ripe, fertile fronds are left bare by the tide. The fertilized ovum soon develops a wall, becomes attached, and proceeds to divide and lengthen, forming a root-like attachment at one end, a growing point at the other. This illustration shows a Fucus, 1) a cross-section of a fertile frond, 2) a female conceptacle, 3) a male conceptacle, and 4) Zoospores and Antheridia.

Fucus

Fucus is the generic name of various species of brown seaweed which form the main vegetation of rocky…

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…

"And Jehovah prepared a great fish to swallow up Jonah; and Jonah was in the belly of the fish three days and three nights." Jonah 1:17 ASV <p>Illustration of Jonah, looking up towards the sky, as he is swallowed by an enormous fish. The fishes scales, fins, and tail can be seen thrashing in the waves. Some shells are pictured in front of Jonah (bottom left).

Jonah is Swallowed by a Great Fish Sent by God

"And Jehovah prepared a great fish to swallow up Jonah; and Jonah was in the belly of the fish three…

"And when he was entered into a boat, his disciples followed him. And behold, there arose a great tempest in the sea, insomuch that the boat was covered with the waves: but he was asleep." Matthew 8:23-24 ASV <p>Illustration of Jesus asleep in the bow of a boat while a tempest rages around him. His disciples are in the boat with him. Four disciples pray to Jesus, the rest are trying to keep the boat from sinking in the waves. The boat has one mast with a collapsed sail.

Jesus Sleeps Through a Storm at Sea

"And when he was entered into a boat, his disciples followed him. And behold, there arose a great tempest…

"The curve of sines, in which the abscissas are proportional to an angle, and the ordinates to its sine." -Whitney, 1889

Sinusoid or Sine Wave

"The curve of sines, in which the abscissas are proportional to an angle, and the ordinates to its sine."…

"On the morrow a great multitude that had come to the feast, when they heard that Jesus was coming to Jerusalem, took the branches of the palm trees, and went forth to meet him, and cried out, Hosanna: Blessed is he that cometh in the name of the Lord, even the King of Israel. And Jesus, having found a young ass, sat thereon; as it is written, Fear not, daughter of Zion: behold, thy King cometh, sitting on an ass's colt." John 12:12-15 ASV <p>Illustration of Jesus riding up to the walls of Jerusalem on a donkey. A multitude of people are gathered around him, some falling to their knees and bowing, while others wave palm fronds. The twelve disciples, signified by halos over their heads, follow behind him. The walls and arched gate are visible.

The Triumphal Entry of Jesus into Jerusalem

"On the morrow a great multitude that had come to the feast, when they heard that Jesus was coming to…