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Triangle with metal rings

Triangle

Triangle with metal rings

A cylindrical steel bar, bent into a equilateral triangle. It is struck with a small bar of the same metal.

Triangle

A cylindrical steel bar, bent into a equilateral triangle. It is struck with a small bar of the same…

Spring scales are used to weigh articles in which a high degree of exactness is not required. Spring scales measure weight only, not mass.

Spring Scales

Spring scales are used to weigh articles in which a high degree of exactness is not required. Spring…

"The only species, <em>C. ferox</em>, is but fifteen inches long, but its strength is great. Its disposition is ferocious and sanguinary in the highest degree. The body is slender and the back arched; the color is russet, the head round, and the claws retractile." &mdash;Goodrich, 1885

Cryptoprocta Ferox

"The only species, C. ferox, is but fifteen inches long, but its strength is great. Its disposition…

Shaped like an equalateral triangle or the Greek letter delta.

Deltoid

Shaped like an equalateral triangle or the Greek letter delta.

"The Pen-Fish or Common Calamary, <em>L. vulgaris</em>, is the best-known species of the genus; the body is somewhat pellucid, of a greenish hue, changeable to dirty brown; the eyes are large and lustrous, of an emerald green, phosphoric, and fiery in a high degree. It is common in the european seas, and was known to the ancient Greeks and Romans. [Shown with a quill pen]" &mdash; Goodrich, 1859

Common calamari

"The Pen-Fish or Common Calamary, L. vulgaris, is the best-known species of the genus; the…

"Hedgehog is a quadruped distinguished by having the body covered with spines instead of hair. The skin of the back is provided with a great orbicular muscle which enables the animal to roll itself up in the form of a ball. The tail is very short. There are several species&mdash;some authorities enumerate 14. The best known is the common hedgehog. This species has a long nose, the nostrils bordered on each side by a loose flap; the hind feet have five toes; the ears are short, rounded, naked and dusky; the upper part of the face, sides, and rump covered with strong, coarse hair, of a yellowish ash color, the back with sharp strong spines of a whitish tint with a bar of black through their middle. They are usually abot 10 inches long, the tail about one. Their usual residence is in small thickets, and they feed on fallen fruits, roots, and insects; they are also fond of flesh, either raw or roasted. The hedgehog defends himself from the attacks of other animals by rolling himself up, and thus exposing no part of his body that is not furnished with a defense of spines. It may be rendered domestic to a certain degree, and has been employed to destroy cockroaches which it pursues with avidity. In the winter the hedgehog wraps itself in a warm nest, composed of moss, dried hay and leaves, and remains torpid till spring."—(Charles Leonard-Stuart, 1911)

Hedgehog

"Hedgehog is a quadruped distinguished by having the body covered with spines instead of hair. The skin…

"Ancilia carried by Salii. The sacred shield carried by the Salii, and made of bronze. The original ancile was found, according to tradition, in the palace of Numa; and, as no numan hand has brought it there, it was concluded that it had been sent from heaven. At the same time, the haruspices declared that the Roman state would endure so long as this shield remained in Rome. To secure its preservation in the city, Numa ordered eleven other shields, exactly like it, to be made by the armourer, Mamurius Veturius, and twelve ancilia. They were kept in the temple of that divinity, on the Palatine mount, and were taken from it only once a year, on the calends of March. The feast of the god was then observed during several daysl when the Salaii carried their shields about the city, singing songs in praise of Mars, Numa, and Mamurius Veturius, and at the same time performing a dance, which probably in some degree resembled our morris with rods, so as to keep time with their voices, and with the movements of their dance. The preceding cut shows one of these rods, as represented on the tomb of pontifex salius, or chief of the Salii" &mdash; Smith, 1873

Ancile

"Ancilia carried by Salii. The sacred shield carried by the Salii, and made of bronze. The original…

"An ornament of wooden planks, which constituted the highest part of the poop of a ship. From the representations of two ancient ships annexed, we see the position of the aplustre. It rose immediately behind the gubernator, who held the rudder and guided the ship, and it served in some degree to protect him from the wind and the rain." &mdash; Smith, 1873

Aplustre

"An ornament of wooden planks, which constituted the highest part of the poop of a ship. From the representations…

"Starfish is a popular name for any individual of the family Asterid&aelig;, a familiar object on the Atlantic coasts. The body is more or less star shaped, and consists of a central portion, or disk, surrounded by five or more lobes, or arms, radiating from the body and containing prolongations of the viscera. The mouth is situated in the center of the lower surface of the body, and the anus is either absent or on the upper surface. Locomotion is effected by means of peculiar tube-like processes, which are protruded from the under surface of the arms. They possess in a high degree the power of reproducing lost members and abound in all seas. [Pictured] Lesser Sand-star (Ophiura albida)"&mdash;(Charles Leonard-Stuart, 1911)

Lesser Sand-Star Starfish

"Starfish is a popular name for any individual of the family Asteridæ, a familiar object on the…

"Starfish is a popular name for any individual of the family Asterid&aelig;, a familiar object on the Atlantic coasts. The body is more or less star shaped, and consists of a central portion, or disk, surrounded by five or more lobes, or arms, radiating from the body and containing prolongations of the viscera. The mouth is situated in the center of the lower surface of the body, and the anus is either absent or on the upper surface. Locomotion is effected by means of peculiar tube-like processes, which are protruded from the under surface of the arms. They possess in a high degree the power of reproducing lost members and abound in all seas. [Pictured]Common Starfish, reproducing rays"&mdash;(Charles Leonard-Stuart, 1911)

Common Starfish

"Starfish is a popular name for any individual of the family Asteridæ, a familiar object on the…

"Starfish is a popular name for any individual of the family Asterid&aelig;, a familiar object on the Atlantic coasts. The body is more or less star shaped, and consists of a central portion, or disk, surrounded by five or more lobes, or arms, radiating from the body and containing prolongations of the viscera. The mouth is situated in the center of the lower surface of the body, and the anus is either absent or on the upper surface. Locomotion is effected by means of peculiar tube-like processes, which are protruded from the under surface of the arms. They possess in a high degree the power of reproducing lost members and abound in all seas. [Pictured]Common Starfish (Asterias rubens)"&mdash;(Charles Leonard-Stuart, 1911)

Common Starfish

"Starfish is a popular name for any individual of the family Asteridæ, a familiar object on the…

"Starfish is a popular name for any individual of the family Asterid&aelig;, a familiar object on the Atlantic coasts. The body is more or less star shaped, and consists of a central portion, or disk, surrounded by five or more lobes, or arms, radiating from the body and containing prolongations of the viscera. The mouth is situated in the center of the lower surface of the body, and the anus is either absent or on the upper surface. Locomotion is effected by means of peculiar tube-like processes, which are protruded from the under surface of the arms. They possess in a high degree the power of reproducing lost members and abound in all seas. [Pictured]Eyed Cribella (Cribella oculata)"&mdash;(Charles Leonard-Stuart, 1911)

Eyed Cribella Starfish

"Starfish is a popular name for any individual of the family Asteridæ, a familiar object on the…

"Starfish is a popular name for any individual of the family Asterid&aelig;, a familiar object on the Atlantic coasts. The body is more or less star shaped, and consists of a central portion, or disk, surrounded by five or more lobes, or arms, radiating from the body and containing prolongations of the viscera. The mouth is situated in the center of the lower surface of the body, and the anus is either absent or on the upper surface. Locomotion is effected by means of peculiar tube-like processes, which are protruded from the under surface of the arms. They possess in a high degree the power of reproducing lost members and abound in all seas. [Pictured]Gibbous Starlet (Asterina gibbosa)"&mdash;(Charles Leonard-Stuart, 1911)

Lesser Sand-star Starfish

"Starfish is a popular name for any individual of the family Asteridæ, a familiar object on the…

"An ancient Greek or Roman temple, of rectangular construction, is terminated at its upper extremity by a triangular figure, both in front and rear, which rests upon the cornice of the entablature as a base, and has its sides formed by the cornices which terminate the roof. The whole of this triangle above the trabeation is implied in the term fastigium." &mdash; Smith, 1873.

Fastigium

"An ancient Greek or Roman temple, of rectangular construction, is terminated at its upper extremity…

"Athens is said to have derrived its name from the prominence given to its worship of Athena by its king erechtheus. The inhabitants were previously called Crannai and Cecropidae, from Cecrops, who, according to tradition, was the original founder of the city. This at first occupied the hill or rock which afterwards became the <em>Acropolis</em>, but gradually the buildings began to spread over the ground at the southern foot of this hill. It was not till the time of Pisitratus and his sons (B.C. 560-514) that the city began to assume any degree of splendour. The most remarkable of these building deposits was the gigantic temple of the Olympian Zeus, which, however, was not finished till many centuries later."&mdash; Smith, 1882

Temple of the Olympian Zeus

"Athens is said to have derrived its name from the prominence given to its worship of Athena by its…

"The cut represents a painting from a wall at Pompeii, the subject of which is the sacrifice of Iphigenia, and which probably was copied in some degree from the famous painting of Timanthes. Calchas stands near the altar, holding the sacrificial knife; Diomede and Ulysses have Iphigenia in their grasp, and are about to place her on the altar; Agamemnon turns away his head enveloped in the folds of his mantle, while Diana is seen in the air, causing a nymph to bring her the hind that is to be substituted for the maiden." &mdash; Anthon, 1891

Sacrifice of Iphigenia

"The cut represents a painting from a wall at Pompeii, the subject of which is the sacrifice of Iphigenia,…

"A square used by carpenters, masons, and other artificers to make their work rectangular. It was made by taking three flat wooden rulers of equal thickness, one of them being two feet ten inches long, the others each two feet long, and joining them together by their extremities, so as to assume the form of a right-angled triangle. This method, though only a close approximation, must have been quite sufficient for all common purposes. For the sake of convenience, the longest side, i. e. the hypotenuse of the triangle, was discarded, and the instrument then assumed the form in which it is exhibited, among other tools, on a tomb found at Rome, and which resembles that in modern use. A square of a still more simple fashion made by merely cutting a rectangular piece out of a board is shown on another sepulchral monument and copied in the woodcut which is here introduced." &mdash; Smith, 1873

Norma

"A square used by carpenters, masons, and other artificers to make their work rectangular. It was made…

"An athletic game, in which all the powers of the fighter were called into action. The pancratium was one of the games or gymnastic contests which were exhibited at all the great festivals of Greece; it consisted of boxing and wrestling, and was reckoned to be one of the heavy or hard exercises, on account of the violent exertions it required, and for this reason it was not much practised in the gymnasia. In Homer we find neither the game nor the name of the pancratium mentioned, and as it was not introduced at the Olympic games until Ol. 33, we may presume that the game, though it may have existed long before in a rude state, was not brought to any degree of perfection until a short time before that event. The name of the combatants was Pancratiastae, or Pammachi. They fought naked, and had their bodies anointed and covered with sand, by which they were enabled to take hold of one another. When the contest began, each of the fighters might commence by boxing or by wrestling, accordingly as he thought he should be more successful in the one than in the other. The victory was not decided until one of the parties was killed, or lifted up a finger, thereby declaring that he was unable to continue the contest either from pain or fatigue." &mdash; Smith, 1873

Pancratium

"An athletic game, in which all the powers of the fighter were called into action. The pancratium was…

"Carry back the left foot and lie flat on the belly, inclining the body about 35 degree to the right." — Moss, 1914

Lie Down

"Carry back the left foot and lie flat on the belly, inclining the body about 35 degree to the right."…

"Carry back the left foot and lie flat on the belly, inclining the body about 35 degree to the right." — Moss, 1914

Lie Down

"Carry back the left foot and lie flat on the belly, inclining the body about 35 degree to the right."…

A genus of wading birds, one species of which was regarded in ancient Egypt with a degree of respect bordering on adoration.

Ibis

A genus of wading birds, one species of which was regarded in ancient Egypt with a degree of respect…

"A force pushing a weight from C to D, only raises it through the perpendicular height, E D, by acting along the whole length of the plane, C D; and if the plane be twice as it is high, one pound at B, acting over the pulley, D, would balance two pounds at A, or any where on the plane; and so of all other quantities and proportions." — Goodrich, 1844

Inclined Plane

"A force pushing a weight from C to D, only raises it through the perpendicular height, E D, by acting…

A bar of steel bent into the form of a triangle, and struck with a small rod.

Triangle

A bar of steel bent into the form of a triangle, and struck with a small rod.

"This triangular shape is a good one also for a movable poultry-house in its simplest form." &mdash; Harcourt, 1889

Triangular coop

"This triangular shape is a good one also for a movable poultry-house in its simplest form." —…

"That the screw is a modified inclined plane, may be shown by winding a triangular piece of paper around a cylinder." &mdash; Avery, 1895

Diagram of a screw

"That the screw is a modified inclined plane, may be shown by winding a triangular piece of paper around…

"The tetrahexahedron is a form composed of twenty-four isoceles triangular faces, each of which intersects one axis at unity, the second at some multiple, and is parallel to the third." &mdash; Ford, 1912

Tetrahexahedron

"The tetrahexahedron is a form composed of twenty-four isoceles triangular faces, each of which intersects…

"This form consists of twelve isoceles triangular faces, each of which intersects two of the horizontal crystallographic axes equally, is parallel to the third horizontal axis and intersects the vertical axis." &mdash; Ford, 1912

Pyramid of the first order

"This form consists of twelve isoceles triangular faces, each of which intersects two of the horizontal…

"Hexagonal-rhombohedral; hemimorphic. Crystals usually prismatic, vertically striated. A triangular prism, with three faces, prominent, which with the tendency of the prism faces to be vertically striated and to round into each other gives the crystals usually a cross section like a spherical triangle." &mdash; Ford, 1912

Tourmaline

"Hexagonal-rhombohedral; hemimorphic. Crystals usually prismatic, vertically striated. A triangular…

"Hexagonal-rhombohedral; hemimorphic. Crystals usually prismatic, vertically striated. A triangular prism, with three faces, prominent, which with the tendency of the prism faces to be vertically striated and to round into each other gives the crystals usually a cross section like a spherical triangle. Crystals are commonly terminated by base and low positive and negative rhombohedrons; sometimes scalenohedrons are present. When the crystals are doubly terminated they usually show different forms at the opposite ends of the vertical axis." &mdash; Ford, 1912

Tourmaline

"Hexagonal-rhombohedral; hemimorphic. Crystals usually prismatic, vertically striated. A triangular…

"Having equal sides." &mdash; Williams, 1889

Equilateral triangle

"Having equal sides." — Williams, 1889

A triangular prism.

Triangular prism

A triangular prism.

"This distinguished American was born in 1794, at Dorchester, near Boston, Massachusetts, entered Harvard College in 1807, and took his degree in 1811." &mdash;The Popular Cyclopedia, 1888

Edward Everette

"This distinguished American was born in 1794, at Dorchester, near Boston, Massachusetts, entered Harvard…

An isosceles triangle is one having two of its sides equal.

Isosceles

An isosceles triangle is one having two of its sides equal.

An equilateral triangle is one having all of its sides equal.

Equilateral

An equilateral triangle is one having all of its sides equal.

A scalene triangle is one having no two of its sides equal.

Scalene

A scalene triangle is one having no two of its sides equal.

A right-angled triangle is any triangle having one right angle. The side opposite the right angle is called the hypotenuse. A right-angled riangle may be isosceles or scalene.

Right-Angled

A right-angled triangle is any triangle having one right angle. The side opposite the right angle is…

Interior of the ear. There is external to the head a wide-mouthed tube, or ear-trumpet (a), for catching and concentrating the waves of sound. It is movable in many beings, so that they can direct it to the place from which the sound comes. The sound concentrated at the bottom of the ear-tube falls upon a membrane stretched across the channel, like the parchment of an ordinary drum, over the space called the <em>tympanum</em>, or <em>drum of the ear</em> (b), and causes the membrane to vibrate. That its motion may be free, the air contained within the drum has free communication with the external air by the open passage (f), called the <em>eustachian tube</em>, leading to the back of the mouth. A degree of deafness ensues when this tube is obstructed, as in a cold; and a crack, or sudden noise, with immediate return of natural hearing, is, generally experienced when, in the effort of sneezing or otherwise, the obstruction is removed. The vibrations of the membrane of the drum are conveyed further inwards, through the cavity of the drum, by a chain of four bones (not here represented on account of their minuteness), reaching from the centre of the membrane to the <em>oval door</em> or <em>window</em>, leading into the labyrinth (e). The labyrinth, or complex inner compartment of the ear, over which the nerve of hearing is spread as a lining, is full of watery fluid; and, therefore, by the law of fluid pressure, when the force of the moving membrane of the drum, acting through the chain of bones, is made to compress the water, the pressure is felt instantly over the whole cavity. The labyrinth consists of the <em>vestibule</em> (e), the three <em>semicircular canals</em> (c), imbedded in the hard bone, and a winding cavity, called the <em>cochlea</em> (d), like that of a snail-shell, in which fibres, stretched across like harp-strings, constitute the <em>lyra</em>.

Ear

Interior of the ear. There is external to the head a wide-mouthed tube, or ear-trumpet (a), for catching…

Built on the right angle triangle and, like the Signet of David, it is found in many of the Turkish and Caucasian fabrics and to it scores of patterns may be traced.

Solomon's Seal

Built on the right angle triangle and, like the Signet of David, it is found in many of the Turkish…

"In any right triangle, the square described on the hypotenuse is equal to the sum of the squares described on the other two sides. If A B C, is a right triangle, right angled at B, then the square described on the hypotenuse AC is equal to the sum of the suares described on the sides A B and B C." &mdash; Hallock, 1905

Right Triangle

"In any right triangle, the square described on the hypotenuse is equal to the sum of the squares described…

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called the frustum of the pyramid." &mdash; Hallock, 1905

Pyramid

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called the frustum of the cone." &mdash; Hallock, 1905

Cone

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"For drawing ink lines other than arcs of circles, the ruling pen is used. It should be held as nearly perpendicular to the board as possible, bearing lightly against the T square or triangle, along the edge of which the line is drawn. After a little practice, this position will become natural, and no difficulty will be experienced." &mdash; Hallock, 1905

Ruling Pen

"For drawing ink lines other than arcs of circles, the ruling pen is used. It should be held as nearly…

"For drawing ink lines other than arcs of circles, the ruling pen is used. It should be held as nearly perpendicular to the board as possible, bearing lightly against the T square or triangle, along the edge of which the line is drawn. After a little practice, this position will become natural, and no difficulty will be experienced." &mdash; Hallock, 1905

Ruling Pen

"For drawing ink lines other than arcs of circles, the ruling pen is used. It should be held as nearly…

"The outer edge is a semicircle, with center at 0, and is divided into 360 parts. Each division is one-half of one degree, and, for convenience, the degrees are numbered from 0 to 180 from both A and B." &mdash; Hallock, 1905

Protractor

"The outer edge is a semicircle, with center at 0, and is divided into 360 parts. Each division is one-half…

"A strange triangular bridge at Croyland was probably built for or by a religious body. This structure stands at the confluence of the Welland, the Nyne, and the Catwater drain; three pointed arches, having their abutments at the angles of an equilateral triangle, meet in the middle, giving three watercourses and three roadways." &mdash; Encyclopedia Britanica, 1893

Croyland Bridge

"A strange triangular bridge at Croyland was probably built for or by a religious body. This structure…

An instrument for regulating or adjusting a circuit so that any required degree of resistance may be maintained.

Rheostat

An instrument for regulating or adjusting a circuit so that any required degree of resistance may be…

"Condensing Octant.—The central fixed apparatus bb with spherical mirror dd throws its rays directly over the angle of 45 degrees pgp, while the supplemental rays fall upon the straight condensing prisms p, each of which spreads the incident rays parallel to the corresponding rays in the central angle pgp. In this way the whole of the front hemisphere of rays is parallelized in the vertical plane and spread equally over the 45 degree in azimuth." —The Encyclopedia Britannica, 1910

Condensing Octant

"Condensing Octant.—The central fixed apparatus bb with spherical mirror dd throws its rays directly…

"Condensing Octant.—The central fixed apparatus bb with spherical mirror dd throws its rays directly over the angle of 45 degrees pgp, while the supplemental rays fall upon the straight condensing prisms p, each of which spreads the incident rays parallel to the corresponding rays in the central angle pgp. In this way the whole of the front hemisphere of rays is parallelized in the vertical plane and spread equally over the 45 degree in azimuth." —The Encyclopedia Britannica, 1910

Condensing Octant

"Condensing Octant.—The central fixed apparatus bb with spherical mirror dd throws its rays directly…

"The internal structure of the lion, except in slight details, resembles that of the other Felidae, the whole organization being that of an animal modified to fulfil, in the most perfect degree yet attained, an active, predaceous mode of existence." &mdash;The Encyclopedia Britannica, 1910

Lion Skull

"The internal structure of the lion, except in slight details, resembles that of the other Felidae,…

A leaf shaped like a triangle.

Sagittate Leaf

A leaf shaped like a triangle.

"Summer and Winter rays.&mdash;Let us suppose that the rays falling perpendicularly on a given extent of surface, impart to it a certain degree of heat, then it is obvious, that if the same number of rays be spread over twice that extent of surface, their heating power would be diminished in proportion, and that only half of the heat would be imparted. This is the effect produced by the Sun's rays in the Winter. They fall so obliquely on the Earth, as to occupy nearly double the space that the same number of rays do in the Summer." &mdash;Comstock, 1850

Rays

"Summer and Winter rays.—Let us suppose that the rays falling perpendicularly on a given extent…

three small leaves together forming a geometrical shape.

doodad

three small leaves together forming a geometrical shape.

Caucasians typically have the lowest degree of projection of the alveolar bones which contain the teeth, a notable size prominence of the cranium and forehead region, and a projection of the midfacial region.

Caucasian

Caucasians typically have the lowest degree of projection of the alveolar bones which contain the teeth,…