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(1844-1925) Writer who fought in the Civil War who wrote Silent South and fought for equal rights for African-Americans

George W. Cable

(1844-1925) Writer who fought in the Civil War who wrote Silent South and fought for equal rights for…

The kalong bat can have a wingspan up to five feet. Its head is like that of the fox, and it lives primarily on fruits. They live in groups in trees.

Kalong Bat

The kalong bat can have a wingspan up to five feet. Its head is like that of the fox, and it lives primarily…

These hummingbirds "are alike only in their long, slender bills", (Hooker, 1886).

Hummingbirds

These hummingbirds "are alike only in their long, slender bills", (Hooker, 1886).

A cylinder is a body of uniform diameter throughout its entire length, whose ends are equal parallel circles.

Cylinder

A cylinder is a body of uniform diameter throughout its entire length, whose ends are equal parallel…

A Cor A piston can produce with equal facility the seven series of harmonies belonging to the common horns

Cor A Piston

A Cor A piston can produce with equal facility the seven series of harmonies belonging to the common…

Groups of people gathered on the shores of a river.

Fort Donelson After Its Surrender

Groups of people gathered on the shores of a river.

"A nut she doesn't try to crack. No equal suffrage state or country ever repealed its suffrage law."

Women's Suffrage Cartoon - Uncrackable

"A nut she doesn't try to crack. No equal suffrage state or country ever repealed its suffrage law."

"One ounce of fact is worth a ton of theory."

Women's Suffrage Cartoon - Ounce of Fact

"One ounce of fact is worth a ton of theory."

A five-leaved ornament, in circular and other divisions of the windows of ancient churches, and also on panels. It is a rosette of five equal leaves.

Cinquefoil

A five-leaved ornament, in circular and other divisions of the windows of ancient churches, and also…

"The Confederate batteries shelling the Federal position on the night of the Battle of Cedar Mountain, August 9th, 1862- wounded men lying on the ground, McDowell's division marching on the field. The scene at night was very striking. It was past ten o'clock, and there was a bright moonlight and a clear blue sky. The Federal troops were on a rising ground, while the enemy's batteries were shelling from the woods, the Federal batteries replying, and one by one driving them further back. The hospital was near the Federal position, and wounded men wre lying on the ground, waiting their turn to receive surgical attention. Near them were groups of stragglers, ambulances, ammunition wagons, etc." — Frank Leslie, 1896

Battle of Cedar Mountain

"The Confederate batteries shelling the Federal position on the night of the Battle of Cedar Mountain,…

"Is about the size of a rat.. Their legs are of equal length, and terminate into five toes, which are armed with small claws, usually free, thugh not fequently united by a swimming membrane. Their nose is more or less produced, and the tail is elongated, usually tapering, covered with scales." —Goodrich, 1885

Shrews

"Is about the size of a rat.. Their legs are of equal length, and terminate into five toes, which are…

"A cross between an old english hound and the greyhound. It is from twenty-two inches to two feet in height, and of middle size. The head and fur are of great beauty, the scent exquisite, and the speed great - equal to the swiftest horse." —Goodrich, 1885

Fox Hound

"A cross between an old english hound and the greyhound. It is from twenty-two inches to two feet in…

"The Leopard, <em>Felis leopardus</em>, is about half the size of the tiger, being two feet high and four long, and is distinguished alike for the elegance of its form, the grace of its movements, and the beauty of its skin. The latter is of a pale yellow color, marked with small tawny spots, united in circular or quadrangular groups, these groups bein arranged nearly in rows, and covering the whole body." &mdash; S. G. Goodrich, 1885

Leopard

"The Leopard, Felis leopardus, is about half the size of the tiger, being two feet high and…

"This has ears of moderate size; fur long; upper parts of the snimal penciled with dusky and brownish-yellow in about equal proportions; sides and under parts of the prevailing tint, brown-yellow; tip of muzzle and chin white; a yellow patch immediately beneath the ear opening; feet dusky brown." &mdash; S. G. Goodrich, 1885

Coypu

"This has ears of moderate size; fur long; upper parts of the snimal penciled with dusky and brownish-yellow…

"Desperate hand-to-hand combat between Federal cavalry, commanded by General Averill and the daring Confederate general Fitzhugh Lee belong the chief honors of this brilliant affair. Once across the river, a regular cavalry and artillery fight took place between General Averill's command and the Confederate forces under the command of Generals Stuart and Fitzhugh Lee; and for once during the war there was a fair cavalry fight. The forces opposed to each other were about equal in numbers and similarly appointed and equipped. The Confederates, made desperate by the advance of Federal troops across the Rappahannock and upon soil which they had sworn to defend with the last drop of their blood, disputed every rood of ground. Again and again they charged on the Federal lines, formed <em>en echelon</em>, and as often were they repulsed in the most gallant manner. When the Federals charged upon the enemy's lines it was done with such impetuosity that successful resistance was impossible. Sword in hand they dashed upon the foe, who, after attempting to stand up against the first charges, doggedly retired before them. The object of the expedition having been accomplished, General Averill retired to the left bank of the river without molestation from the enemy."— Frank Leslie, 1896

Hand-to-hand Combat

"Desperate hand-to-hand combat between Federal cavalry, commanded by General Averill and the daring…

"The war on the Red River. Admiral Porter's fleet passing through Colonel Bailey's Dam, above Alexandria, May, 1864. Admiral David D. Porter's official report: 'The water had fallen so low that I had no hope or expectation of getting the vessels out this season, and, as the army had made arrangements to evacuate the country. I saw nothing before me but the destruction of the best party of the Mississippi squadron. There seems to have been an especial Providence looking out for us in providing a man equal to the emergency. Lieutenant Colonel Bailey, Acting Engineer of the Nineteenth Army Corps, proposed a plan of building a series of dams across the rocks at the falls, and raising the water high enough to let the vessels pass over. This proposition looked like madness, and the best engineers ridiculed it, but Colonel Bailey was so sanguine of success that I requested General Banks to have it done, and he entered heartily in the work. Provisions were short and forage was almost out, and the dam was promised to be finished in ten days, or the army would have to leave us. The work was successfully accomplished and the fleet passed over safely. Words are inadequate to express the admiration I feel for the abilities of Lieutenant Colonel Bailey. This is without doubt the greatest engineering feat ever performed. Under the best circumstances, a private company would not have completed this work under one year, and, to an ordinary mind, the whole thing would have appeared an utter impossibility. Leaving out his abilities as an engineer, he ws rendered a great service to the country, having saved to the Union a valuable fleet worth fully two million dollars.'"&mdash; Frank Leslie, 1896

Red River

"The war on the Red River. Admiral Porter's fleet passing through Colonel Bailey's Dam, above Alexandria,…

"The war in Virginia- Sheridan's Great Battle with J. E. B. Stuart at Yellow Tavern, May 11th, 1864- the Confederate raider's last fight. We give a sketch, which our readers cannot fail to admire, of the battle of Yellow Tavern, May 11th, 1864, where General J. E. B. Stuart, whose fame began by a successful raid around McClellan, fell mortally wounded. Our correspondent wrote: 'We found the enemy very strongly entrenched behind fortifications composing the outer line of the Richmond defenses. The position was a strong one, being situated upon a hill, commanding our whole corps, and our preservation depended on our driving them out. General Sheridan was equal to the emergency. The enemy was already pursuing us closely in the rear. The general ordered Custer to take his gallant brigade and carry the position. General Custer placed himself at the head of his command, and with drawn sabres and deafening cheers charged directly in the face of a withering fire, captured two pieces of artillery, upward of one hundred prisoners, together with caissons, ammunition and horses, which he brought off in safety. It was, without exception, the most gallant charge of the raid, and when it became known among the corps cheer after cheer rent the air. The Confederates retreated behind the Chickahominy, destroying in their flight Meadow Bridge. In the rear, Colonel Gregg's brigade of the Second Division, under General Wilson, was hotly engaged with Stuart. General Wilson sent word to General Sheridan that the enemy were driving him slowly back. General Sheridan replied that he must hold the position at all hazards- that he could and must whip the enemy. Colonel Gregg's brigade being re-enforced by a regiment from the First Brigade, charged the enemy and drove them nearly a mile. The day was now ours. The enemy had disappeared from our front, and we succeeded in rebuilding the Meadow Bridge, and the First and Third Divisions crossed, covered by the Second Division which in turn withdrew and also crossed, without being annoyed by the enemy.' In a desperate charge at the head of a column the Confederate general Stuart fell mortally wounded."— Frank Leslie, 1896

Sheridan's Great Battle

"The war in Virginia- Sheridan's Great Battle with J. E. B. Stuart at Yellow Tavern, May 11th, 1864-…

"Two and a half inches long, with a tail of nearly equal length. It is of a grayish-brown, with a black band running along the back." &mdash; S. G. Goodrich, 1885

Sminthus Loriger

"Two and a half inches long, with a tail of nearly equal length. It is of a grayish-brown, with a black…

"The Sixteenth Regiment, Ohio Volunteers, under Colonel Irwine, crossing the tray run viaduct, near Cheat River, on the Baltimore and Ohio Railroad. On its way to Rowlesburg, Va., the Sixteenth Regiment of Ohio Volunteers crossed the Tray Run Viaduct, one of the most remarkable engineering works on the whole line of the Baltimore and Ohio Railroad. It spans a deep gorge in the mountains six hundred feet in width, and at a height of one hundred and sixty feet above the bed of the ravine. The roadway is supported on iron columns, secured and braced in a peculiar manner, and placed on a solid mass of masonry, which fills up the bottom of the run. The scenery at this point is equal to anything in the world, combining the choicest materials of mountain, forest and river."&mdash; Frank Leslie, 1896

Sixteenth Regiment

"The Sixteenth Regiment, Ohio Volunteers, under Colonel Irwine, crossing the tray run viaduct, near…

"In 1799, the Rosetta Stone was found and gave the first key to the reading of hieroglyphics. On this stone the same inscription was given in three different sets of characters, -the hieroglyphics, the demotic text (a briefer and more running form of hieroglyphics, commonly used in the papyri or manuscripts), and the Greek. By comparing the letters in certain Greek proper names with the letters of the same words in the Egyptian texts, the sounds for which the Egyptian characters stood were discovered. The Greek text, when translated, showed that the inscription was an ordinance of the priests decreeing certain honors to Ptolemy Epiphanes on the occasion of his coronation, 196 B.C. (Ptolemy Epiphanes was one of a line of Greek sovereigns who ruled over Egypt from the time of its conquest by Alexander in the fourth century, to the first century B.C.) It contains a command that the decree should be inscribed in the sacred letters (hieroglyphics), the letters of the country (demotic), and Greek letters, -and this for the convenience of the mixed population of Egypt under its Greek rulers. It was natural to conclude that the three texts were the same in substance, and accordingly earnest efforts were made to decipher the hieroglyphics by aid of the Greek. The first clew was obtained by noticing that certain groups of the hieroglyphic characters were inclosed in oval rings, and that these groups corresponded in relative position with certain proper names, such as Ptolemy, etc., in the Greek text. The following line presents a few of the characters with a group in the oval ring. (Each word is read from right to left)." —Colby, 1899

Excerpt from the Rosetta Stone

"In 1799, the Rosetta Stone was found and gave the first key to the reading of hieroglyphics. On this…

Leaf-sheaths scattered along stem; flowers in several groups.

Fuirena

Leaf-sheaths scattered along stem; flowers in several groups.

"The <em>Lingula anatina</em> has a long peduncle issuing from between the umbones. The valves are nearly equal, horny, and flexible. It is found in the Indian Ocean." &mdash; Goodrich, 1859

Lingula anatina

"The Lingula anatina has a long peduncle issuing from between the umbones. The valves are nearly…

"In the Arcacea the shells are nearly equal, usually thick and furnished with a long row of reeth at the hinge. Among them is the <em>Arca tortuosa</em> the shell somewhat twisted and striated' found in the Indian Ocean." &mdash; Goodrich, 1859

Arca tortuosa

"In the Arcacea the shells are nearly equal, usually thick and furnished with a long row of reeth at…

"The Fern is a leafy plant springing from a rhizome, which creeps below or on the surface of the ground or rises into the air like the trunk of a tree. This trunk does not taper, but is of equal diameter at both ends. Some tree ferns reach 75 feet high."&mdash;(Charles Leonard-Stuart, 1911)

Giant Tree Fern

"The Fern is a leafy plant springing from a rhizome, which creeps below or on the surface of the ground…

"The Foot is that part of the lower extremity below the leg on which we stand and walk. It is composed of three series of groups of bones&ndash; the tarsal, or hindermost; the metatarsal, which occupy the middle portion; and the phalanges, which form the toes.The tarsal bones are seven in number. The metatarsal bones are five in number. The phalanges are 14 in number, three to each toe, except the great one, which has only two."&mdash;(Charles Leonard-Stuart, 1911)

Side View of Bones in Foot

"The Foot is that part of the lower extremity below the leg on which we stand and walk. It is composed…

"The Foot is that part of the lower extremity below the leg on which we stand and walk. It is composed of three series of groups of bones&ndash; the tarsal, or hindermost; the metatarsal, which occupy the middle portion; and the phalanges, which form the toes.The tarsal bones are seven in number. The metatarsal bones are five in number. The phalanges are 14 in number, three to each toe, except the great one, which has only two."&mdash;(Charles Leonard-Stuart, 1911)

Side View of Bones in Foot

"The Foot is that part of the lower extremity below the leg on which we stand and walk. It is composed…

Growing Yeast Cells, showing Method of budding and forming Groups of Cells. Each bud appears as a little swelling on the side of the larger cell, as seen in <em>a</em> and <em>b</em>. In <em>c</em> the little bud has grown to be nearly as large as the parent cell. The little buds grow one after another, making irregularly shaped groups, as shown in <em>d</em>." &mdash; Blaisedell, 1904

Growing yeast cells

Growing Yeast Cells, showing Method of budding and forming Groups of Cells. Each bud appears as a little…

"Salamander is a genus of reptiles closely allied to the frog, from which it differs in having an elongated body terminated by a tail, and four feet of equal length. Together with the frog, this genus is included under the order Batrachia, and is easily distinguished from the lizards by having no nails on the toes, a naked skin destitute of scales, and a heart with a single auricle. "&mdash;(Charles Leonard-Stuart, 1911)

Salamander

"Salamander is a genus of reptiles closely allied to the frog, from which it differs in having an elongated…

"Snipe is the name of a common family of birds. The common American snipe is about equal in size to the common snipe of Europe, and much resembles it also in plumage. The tail has 16 feathers. This species is abundant in summer in the N. parts of the United States and in Canada, and in the more S. States in winter. It is much in request for the table, and is often caught in snares. It is much esteemed as a delicious and well-flavored dish."&mdash;(Charles Leonard-Stuart, 1911)

Snipe

"Snipe is the name of a common family of birds. The common American snipe is about equal in size to…

"The principal silver coin among the Romans, was so called because it was originally equal to ten asses; but on the reduction of the weight of the as, it was made equal to sixteen asses, except in military pay, in which it was still reckoned as equal to ten asses. The denarius was first coined five years before the first Punic war, B.C. 269" &mdash; Smith, 1873.

Denarius

"The principal silver coin among the Romans, was so called because it was originally equal to ten asses;…

"A torch. In the annexed woodcut, the female figure is copied from a fictile vase. The winged figure on the left hand, asleep and leaning on a torch, is from a funeral monument at Rome. The other winged figure represents Cupid as Lethaus Amor. In ancient marbles the torch is sometimes more ornamened than the examples now produced, but it always appears to be formed of wooden staves or twigs, either bound by a rope drawn round them in a spiral form, as in the middle figure blow, or surrounded by circular bands at equal distances, as in the two exterior figures. The inside of the torch may be supposed to have been filled with flax, tow, or other vegetable fibres, the whole being abundantly impregnated with pitch, rosin, wax, oil, and other inflammable substances." &mdash; Smith, 1873.

Fax

"A torch. In the annexed woodcut, the female figure is copied from a fictile vase. The winged figure…

"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…

A genus of plants of natural order Scropulariace&aelig;. having a tubular calyx, the upper lip of the corolla divided, the lower of three nearly equal lobes, the cells of the athers spurred at the base, a two-celled capsule and striated seeds.

Eyebright

A genus of plants of natural order Scropulariaceæ. having a tubular calyx, the upper lip of the…

"A Greek measure of length, and the chief one used for itinerary distances. It was equal to 600 Greek or 625 Roman feet, or to 125 Roman paces; and the roman mile contained 8 stadia. Hence the stadiura contained 600 feet 9 inches English. This standard prvailed throughout Greece, under the name of the Olympic stadium, so called because it was the exact length of the stadium or footrace course at Olympia, measured between the pillars at the two extremities of the course. The first use of the measure seems to be contemporaneous with the formation of the stadium at Olympia when the Olympic games were revived by Iphitus." &mdash; Smith, 1873

Stadium

"A Greek measure of length, and the chief one used for itinerary distances. It was equal to 600 Greek…

The front of a French gold coin first issued by Louis IX. in the thirteenth century. It was equal to aout three United States gold dollars.

Chaise

The front of a French gold coin first issued by Louis IX. in the thirteenth century. It was equal to…

The rear of a French gold coin first issued by Louis IX. in the thirteenth century. It was equal to aout three United States gold dollars.

Chaise

The rear of a French gold coin first issued by Louis IX. in the thirteenth century. It was equal to…

"The early Greeks used a very short sword, as may be seen from the preceding cut. The ancient Homeric sword had generally a straight, two-edged blade, rather broad, and nearly of equal width from hilt to point." &mdash; Anthon, 1891

Greek soldier

"The early Greeks used a very short sword, as may be seen from the preceding cut. The ancient Homeric…

"Syrinx, the Pan's pipe, or Pandean pipe, was the appropriate musical instrument of the Arcadian and other Grecian shepherds, and was regarded by them as the invention of Pan, their tutelary god. When the Roman poets had occasion to mention it, they called it fistula. It was formed in general of seven hollow stems of cane or reed, fitted together by means of wax, having been previously cut to the proper lengths, and adjusted so as to form an octave; but sometimes nine were admitted, giving an equal number of notes." &mdash Smith; 1873

Syrinx

"Syrinx, the Pan's pipe, or Pandean pipe, was the appropriate musical instrument of the Arcadian and…

"On ancient monuments, the torch appears to be formed of wooden staves or twigs, either bound by a rope drawn round them in a spiral form, or surrounded by circular bands at equal distances." &mdash; Anthon, 1891

Torches

"On ancient monuments, the torch appears to be formed of wooden staves or twigs, either bound by a rope…

Writer who fought in the Civil War that wrote <em>Silent South</em> and fought for equal rights for African Americans.

George W. Cable

Writer who fought in the Civil War that wrote Silent South and fought for equal rights for…

"To announce range, extend the arm toward the leaders or men for whom the signal is intended, fist closed; by keeping the fist closed battle sight is indicated; by opening and closing the fist, expose thumb and fingers to a number equal to the hundreds of yards." &mdash; Moss, 1914

Hand signal

"To announce range, extend the arm toward the leaders or men for whom the signal is intended, fist closed;…

Lawyer and feminist and was the first female lawyer to argue before the Supreme Court. She was the presidential candidate for the National Equal Rights Party.

Belva Ann Lockwood

Lawyer and feminist and was the first female lawyer to argue before the Supreme Court. She was the presidential…

A regular solid body, with six equal square sides.

Cube

A regular solid body, with six equal square sides.

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

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.

"The <em>Palaeotherium magnum</em> was of the size of a horse, but thicker and more clumsy; its head was massive, and its legs and tail were short. It resembled a large tapir, but differed somewhat as to the teeth, and had one toe less on the fore-feet. Its height was probably from four to five feet; about equal, it is said, to that of the rhinoceros of Java. It was, no doubt, furnished with a short proboscis or trunk." &mdash; Goodrich, 1844

Palaeotherium magnum

"The Palaeotherium magnum was of the size of a horse, but thicker and more clumsy; its head…

"The Atwood machine consists of a wheel or pulley, R, over the grooved edge of which are balanced two equal weights suspended by a long silk thread which is both light and strong. The axle of this wheel is preferably supported upon the circumfrences of four friction wheels, r, r, r', r', for greater delicacy of motion. As the thread is so light that its weight may be disregarded, it is evident that the weights will be in equilibrium whatever their position." &mdash; Avery, 1895

Atwood Machine

"The Atwood machine consists of a wheel or pulley, R, over the grooved edge of which are balanced two…

"The pulley is a lever with equal arms of the first or second class, but, when it moves. the attachments of the forces are moved. The underlying fact that enables the pulley to afford any mechanical advantage is the uniformity of the tension of the cord in all of its parts, the pulley itself serving only to diminish the friction." &mdash; Avery, 1895

Pulley

"The pulley is a lever with equal arms of the first or second class, but, when it moves. the attachments…

"A crystal has a center of symmetry if an imaginary line is passed from some point on its surface through its center, and a similar point is found on the line at an equal distance beyond the center." &mdash; Ford, 1912

Symmetry plane

"A crystal has a center of symmetry if an imaginary line is passed from some point on its surface through…

"A crystal has a center of symmetry if an imaginary line is passed from some point on its surface through its center, and a similar point is found on the line at an equal distance beyond the center." &mdash; Ford, 1912

Symmetry axis

"A crystal has a center of symmetry if an imaginary line is passed from some point on its surface through…

"A crystal has a center of symmetry if an imaginary line is passed from some point on its surface through its center, and a similar point is found on the line at an equal distance beyond the center." &mdash; Ford, 1912

Symmetry center

"A crystal has a center of symmetry if an imaginary line is passed from some point on its surface through…

"The trapezohedron is a form composed of twenty-four trapezium-shaped faces, each of which intersects one of the crystallographic axes at unity and the other two at equal multiples." &mdash; Ford, 1912

Trapezohedron

"The trapezohedron is a form composed of twenty-four trapezium-shaped faces, each of which intersects…

"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." &mdash; 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." &mdash; Ford, 1912

Negative tetrahedron

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

"If a positive and negative tetrahedron occured together with equal development, the resulting crystal could not be distinguished from an octahedron, unless, as is usually the case, the faces of the two forms showed different lusters, etchings, or striations that would serve to differentiate them." &mdash; Ford, 1912

Positive and negative tetrahedrons

"If a positive and negative tetrahedron occured together with equal development, the resulting crystal…

"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." &mdash; Ford, 1912

First order pyramid

"The pyramid of the first order is a form consisting 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." &mdash; 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." &mdash; 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." &mdash; Ford, 1912

Sphenoid, positive and negative

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

"Orthorhombic. Crystals commonly tabular parallel to basal plane, showing also short prisms and low brachydomes. The brachydomes usually striated parallel to the brachy-axis. Often twinned, given coxcomb and spear-shaped groups." &mdash; Ford, 1912

Marcasite

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