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Triangular form of the harp

Sambuca

Triangular form of the harp

These venomous snakes have triangular heads and short stocky bodies. They are a highly poisonous snake.

Puff-adder

These venomous snakes have triangular heads and short stocky bodies. They are a highly poisonous snake.

An instrument having an upright triangular frame consisting of a pillar, a curved neck, and a hollow back containing the sounding board, with usually 46 or 47 strings of graded lengths that are played by plucking with the fingers.

Harp

An instrument having an upright triangular frame consisting of a pillar, a curved neck, and a hollow…

A Russian musical instrument with a triangular body and three strings that produces sounds similar to those of a mandolin.

Balalaika

A Russian musical instrument with a triangular body and three strings that produces sounds similar to…

A harp is a stringed instrument of triangular form. The sculptures and ruins of the Egyptians and Syrians give evidence that it was a favorite instrument among them.

Ancient Egyptian Harps

A harp is a stringed instrument of triangular form. The sculptures and ruins of the Egyptians and Syrians…

The papyprus is a frequent form in Egyptian ornament. Its straight, stiff triangular stem with four root-leaves wrapping its slightly swelling base, is imitated in the clustered shafts of many columnrs, and painted as a decoration on walls and on bell-capitals, often alternating with conventional lotuses. The stem bears a bunch of tiny flowers, forming with their stems a group of green filiments witht reddish tops, growing out of a calyz of four leaves or bracts. These supply the suggestion for many bell-shaped forms in Egyptian ornament, including the great campaniform capitals of the huge columns of the Karnak hypostyle hall.

Papyrus

The papyprus is a frequent form in Egyptian ornament. Its straight, stiff triangular stem with four…

Candelabrum on a triangular pedistal in Vatican Museum.

Candelabrum

Candelabrum on a triangular pedistal in Vatican Museum.

"Its head is somewhat triangular , the muzzle pointed, the eyes prominent and lively; the body much elongated and very flexible; the tail long, thick, and bushy; the toes naked, but at times, probably in winter, covered beneath with think soft hair. The fur is of two corts - the inner extremely soft, short, copious, and of a light, yellowish-gray color; the outer very long, shining, ash-colored at the roots, brown at hte extremity, but of different degrees of intensity at different parts of the body." — S. G. Goodrich, 1885

Marten

"Its head is somewhat triangular , the muzzle pointed, the eyes prominent and lively; the body much…

$"In <em>optics</em>, a deviation in the rays of light when unequally refracted by a lens or reflected by a mirror, so that they do not converge and meet in a point or focus, but separate, forming an indistinct image of the object, or an indistinct image with prismatically colored edges."-Wright, 1902$

Aberration

"In optics, a deviation in the rays of light when unequally refracted by a lens or reflected…

"The shell of the <em>cleodora pymidata</em> is triangular." — Goodrich, 1859

Cleodora pymidata

"The shell of the cleodora pymidata is triangular." — Goodrich, 1859

"Allorhina nitida- readily distinguished by the fact that the epimera of the mesothorax are visible from above as a triangular piece between the prothorax and the elytra."-Whitney, 1902

Allorhina

"Allorhina nitida- readily distinguished by the fact that the epimera of the mesothorax are visible…

"Round, triangular, or square in plan, often elaborately adorned with sculpture, and bearing inscriptions."-Whitney, 1902

Greek Altar

"Round, triangular, or square in plan, often elaborately adorned with sculpture, and bearing inscriptions."-Whitney,…

"They are distinguished by the possession of a large oval or triangular appendage which covers the base of the first joint of the outer antennae." — Goodrich, 1859

Shrimp

"They are distinguished by the possession of a large oval or triangular appendage which covers the base…

"The Common Barnacle, <em>Lepas anatifera</em>, perhaps the best-known example of the order, generally selects floating objects for this purpose, and frequently covers the bottoms of ships to such an extent as to even impede their progress through the water. It adheres by a flexible stalk, which possesses great contractile power. The shell is usually composed of two triangular pieces on each side, and is closed by another elongated piece on the back." — Goodrich, 1859

Barnacles

"The Common Barnacle, Lepas anatifera, perhaps the best-known example of the order, generally…

"Viper is a genus of venomous snakes. This family includes many important forms– e. g., the common adder, the asp, extending as far N. as Sweden; the African horned viper and puff adder, the Indian daboia or Russell's viper, and the Indian Echis carinata. The head is relatively broad, somewhat triangular, and generally covered with scales; the eye has a vertical pupil, and there is no pit between it and the nostril; the maxilla bears on each side one functional fang, usually with several reserve fangs beside it; the poison is virulent. The vipers are widely distributed through Europe and Australia; the majority are African. As far as is known they are viviparous."—(Charles Leonard-Stuart, 1911)

Common Vipers

"Viper is a genus of venomous snakes. This family includes many important forms– e. g., the common…

"Viper is a genus of venomous snakes. This family includes many important forms– e. g., the common adder, the asp, extending as far N. as Sweden; the African horned viper and puff adder, the Indian daboia or Russell's viper, and the Indian Echis carinata. The head is relatively broad, somewhat triangular, and generally covered with scales; the eye has a vertical pupil, and there is no pit between it and the nostril; the maxilla bears on each side one functional fang, usually with several reserve fangs beside it; the poison is virulent. The vipers are widely distributed through Europe and Australia; the majority are African. As far as is known they are viviparous."—(Charles Leonard-Stuart, 1911)

Common Viper

"Viper is a genus of venomous snakes. This family includes many important forms– e. g., the common…

"Showing how the Bones of the Skull may be artificially deformed by "head-binding." From the photograph of a "triangular" skull found in an Indian grave in Ancon, Peru." — Blaisedell, 1904

Deformed skull

"Showing how the Bones of the Skull may be artificially deformed by "head-binding." From the photograph…

"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." — Smith, 1873.

Fastigium

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

Prism

A transparent body, with usually three sides and two equal and parallel triangular ends or bases.

A transparent body, with usually three sides and two equal and parallel triangular ends or bases.

Quill

A transparent body, with usually three sides and two equal and parallel triangular ends or bases.

Triangular coop

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

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

Triangular coop

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

A hand holding a square pyramid, suspended by a string.

Hand and pyramid

A hand holding a square pyramid, suspended by a string.

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

"Crystal faces are described according to their relations to the crystallographic axes. A series of numbers which indicate the relative distances by which a face intersects the different axes are called its parameters." — Ford, 1912

Orthohombie prism

"Crystal faces are described according to their relations to the crystallographic axes. A series of…

"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." — Ford, 1912

Tetrahexahedron

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

"The trisoctahedron is a form composed of twenty-four isosceles triangular faces, each of which intersects two of the crystallographic axes at unity and the third axis at some multiple. There are various trisoctahedrons the faces of which have different inclinations." — Ford, 1912

Trisoctahedron

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

"The hexoctahedron is a form composed of forty-eight triangular faces, each of which cuts differently on all three crystallographic axes. There are several hexoctahedrons, which have varying ratios of intersection with the axes." — Ford, 1912

Hexoctahedron

"The hexoctahedron is a form composed of forty-eight triangular faces, each of which cuts differently…

"The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all of the crystallographic axes at equal lengths. It can be considered as derived from the octahedron of the Normal Class by the omission of the alternate faces and the extension of the others." — Ford, 1912

Positive tetrahedron

"The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all…

"The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all of the crystallographic axes at equal lengths. It can be considered as derived from the octahedron of the Normal Class by the omission of the alternate faces and the extension of the others. If the other four faces of the octahedron had been extended, the tetrahedron resulting would have had a different orientation, known as the negative tetrahedron." — Ford, 1912

Negative tetrahedron

"The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all…

"The prism of the first order consists of four rectangular vertical faces, each of which intersects the two horizontal crystallographic axes equally." — Ford, 1912

First order prism

"The prism of the first order consists of four rectangular vertical faces, each of which intersects…

"The prism of the second order consists of four rectangular vertical faces, each of which intersects one horizontal crystallographic axis and is parallel to the other two axes." — Ford, 1912

Second order prism

"The prism of the second order consists of four rectangular vertical faces, each of which intersects…

"The dietetragonal prism is a form consisting of eight rectangular vertical faces, each of which intersects one horizontal crystallographic axis and is parallel to the other two axes." — Ford, 1912

Ditetragonal prism

"The dietetragonal prism is a form consisting of eight rectangular vertical faces, each of which intersects…

"The pyramid of the first order is a form consisting of eight isoceles triangular faces, each of which interesects all three crystallographic axes, the intercepts upon the two horizontal axes being equal." — Ford, 1912

First order pyramid

"The pyramid of the first order is a form consisting of eight isoceles triangular faces, each of which…

"The pyramid of the second order is a form composed of eight isoceles triangular faces, each of which intersects one horizontal axis and the vertical axis and is parallel to the second horizontal axis." — Ford, 1912

Second order pyramid

"The pyramid of the second order is a form composed of eight isoceles triangular faces, each of which…

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes, the intercepts on the two horizontal axes being equal. The faces correspond in their position to the alternating faces of the tetragonal pyramid of the first order." — Ford, 1912

Sphenoid

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes, the intercepts on the two horizontal axes being equal. The faces correspond in their position to the alternating faces of the tetragonal pyramid of the first order." — Ford, 1912

Sphenoid

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes, the intercepts on the two horizontal axes being equal. The faces correspond in their position to the alternating faces of the tetragonal pyramid of the first order. There maybe different sphenoids, depending upon their varying intersections with the vertical axes. There may also be a positive and a negative sphenoid, the combination of the two being represented." — Ford, 1912

Sphenoid, positive and negative

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…

"This is a form consisting of six rectangular vertical faces each of which intersects two of the horizontal axes equally and the intermediate horizontal axis at one-half this distance." — Ford, 1912

Prism of the first order

"This is a form consisting of six rectangular vertical faces each of which intersects two of the horizontal…

"This is a form consisting of six rectangular vertical faces, each of which intersects two of the horizontal axes equally and the immediate horizontal axis at one half this distance." — Ford, 1912

Prism of the second order

"This is a form consisting of six rectangular vertical faces, each of which intersects two of the horizontal…

"The dihexagonal prism has twelve rectangular vertical faces, each of which intersects all three of the horizontal crystallographic axes at different lengths." — Ford, 1912

Dihexagonal prism

"The dihexagonal prism has twelve rectangular vertical faces, each of which intersects all three of…

"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." — Ford, 1912

Pyramid of the first order

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

"This is a form composed of twelve isoceles triangular faces, each of which intersects two of the horizontal axes equally, the third and immediate horizontal axis at one-half this distance, and also intersects the vertical axis." — Ford, 1912

Pyramid of the second order

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

"The dihexagonal pyramid is a form of twenty-four isoceles triangular faces, each of which intersects all three of the horizontal axes differently and intersects also the vertical axis." — Ford, 1912

Dihexagonal pyramid

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

"A crystal of zincite with a prism terminated by a pyramid above a basal pinacoid below." — Ford, 1912

Zincite

"A crystal of zincite with a prism terminated by a pyramid above a basal pinacoid below." — Ford,…

"This form consists of twelve scalene triangular faces. These faces correspond in their position to the alternate pairs of faces of a dihexagonal pyramid." — Ford, 1912

Scalenohedron

"This form consists of twelve scalene triangular faces. These faces correspond in their position to…

"Tourmaline crystals show the forms of the Rhombohedral Class but with hemispherical development. They are also commonly characterized by the presence of three faces of a triangular prism." — Ford, 1912

Tourmaline

"Tourmaline crystals show the forms of the Rhombohedral Class but with hemispherical development. They…

"Tourmaline crystals show the forms of the Rhombohedral Class but with hemispherical development. They are also commonly characterized by the presence of three faces of a triangular prism." — Ford, 1912

Tourmaline

"Tourmaline crystals show the forms of the Rhombohedral Class but with hemispherical development. They…

"Tourmaline crystals show the forms of the Rhombohedral Class but with hemispherical development. They are also commonly characterized by the presence of three faces of a triangular prism." — Ford, 1912

Tourmaline

"Tourmaline crystals show the forms of the Rhombohedral Class but with hemispherical development. They…

"The quartz crystals are said to be right or left handed, depending upon whether these faces are to be observed trunctuating the edges between prism and rhombohedron." — Ford, 1912

Right-handed quartz

"The quartz crystals are said to be right or left handed, depending upon whether these faces are to…

"The quartz crystals are said to be right or left handed, depending upon whether these faces are to be observed trunctuating the edges between prism and rhombohedron." — Ford, 1912

Left-handed quartz

"The quartz crystals are said to be right or left handed, depending upon whether these faces are to…

"An orthorhombic pyramid has eight triangular faces, each of which intersects all three of the crystallographic axes." — Ford, 1912

Pyramid

"An orthorhombic pyramid has eight triangular faces, each of which intersects all three of the crystallographic…

Marcasite

"Orthorhombic. Crystals commonly tabular parallel to basal plane, showing also short prisms and low…

"Orthohombric. Usually in tabular diamond-shaped crystals, formed by a short prism terminated by low brachydomes. The brachydomes are usually striated parallel to the brachy-axis." — Ford, 1912

Arsenopyrite

"Orthohombric. Usually in tabular diamond-shaped crystals, formed by a short prism terminated by low…

"Orthohombric. Usually in tabular diamond-shaped crystals, formed by a short prism terminated by low brachydomes. The brachydomes are usually striated parallel to the brachy-axis. Twinned at times, giving stellate groups; the different individuals of the twin groups being distinguished from each other by the direction of the striations upon them." — Ford, 1912

Arsenopyrite

"Orthohombric. Usually in tabular diamond-shaped crystals, formed by a short prism terminated by low…

"Orthohombric. Crystals usually short prismatic to tabular. Sometimes quite complex with many prism, pyramid and dome faces. Frequently twinned, giving tabular crystals with recurring reentrant angles in the prism zone." — Ford, 1912

Bournonite

"Orthohombric. Crystals usually short prismatic to tabular. Sometimes quite complex with many prism,…

"Terminated usually by a combination of a positive and negative rhombohedron, which often are so equally developed as to give the effect of a hexagonal pyramid. Sometimes one rhombohedron predominates or occurs alone. At times the prism faces are wanting, and the combination of the two rhombodendrons gives what appears to be a doubly terminated hexagonal pyramid, known as a quartzoid." — Ford, 1912

Quartz

"Terminated usually by a combination of a positive and negative rhombohedron, which often are so equally…

"Hexagonal-rhombohedral. Crystals usually prismatic in habit or tapering hexagonal pyramids." — Ford, 1912

Corundum

"Hexagonal-rhombohedral. Crystals usually prismatic in habit or tapering hexagonal pyramids." —…

"Hexagonal-rhombohedral. Crystals usually prismatic in habit or tapering hexagonal pyramids." — Ford, 1912

Corundum

"Hexagonal-rhombohedral. Crystals usually prismatic in habit or tapering hexagonal pyramids." —…

Hematite

"Hexagonal-rhombohedral. Crystals usually thick to thin tabular. Basal planes prominent, often showing…