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Shown is the inner aspect of the left half of the skull sagittally divided. Labels: 1, suture between parietal and temporal bone; 2, remains of subarcuate fossa; 3, grooves for branches of the middle meningeal artery; 4, dorsum sellae; 5, pituitary fossa; 6, anterior clinoid fossa; 7, optic foramen; 8, sphenoidal suture; 9, nasal surface of superior turbinated bone; 10, cribriform plate of ethmoid; 11, nasal surface of middle turbinated bone; 12, frontal sinus; 13, nasal spine; 14, nasal bone; 15, nasal process of superior maxilla; 16, middle meatus of nose; 17, directed towards opening of antrum; 18, nasal surface of inferior turbinated bone; 19, inferior meatus of nose; 20, anterior nasal spine; 21, anterior palatine canal; 22, palatal process of superior maxilla; 23, palatal process of palate bone; 24, posterior nasal spine; 25, hamular process of internal pterygoid plate; 26, external pterygoid plate; 27, superior meatus of nose; 28,sphenopalatine foramen; 29, pterygospinous ligament almost completely ossified to enclose a foramen; 30, styloid process of temporal bone; 31, alar spine of sphenoid; 32, mastoid process; 33, basion (midpoint of posterior border of foramen magnum); 34, internal auditory meatus; 35, anterior condylic foramen; 36, leading into jugular foramen; 37, opisthion (midpoint of posterior border of foramen magnum); 38, groove for sigmoid sinus; 39, opening of mastoid foramen; 40, for lateral sinus and attachment of tentorium cerebelli; 41, fossa for lodgment of cerebellar hemisphere; 42, internal occipital protuberance.

Skull Seen From Side

Shown is the inner aspect of the left half of the skull sagittally divided. Labels: 1, suture between…

Shown is a coronal section passing inferiorly through interval between between the first and second molar teeth. Labels: 1, groove of superior longitudinal sinus; 2,crest for attachment of falx cerebri; 3, crista galli of ethmoid; 4, cristiform plate of ethmoid; 5, perpendicular plate of ethmoid, assisting in the formation of nasal septum; 6, lateral mass of ethmoid consisting of the ethmoidal cells; 7, os planum of ethmoid; 8, middle meatus of nose; 9, middle turbinated bone; 10, opening from the middle meatus; 11, orbital plate of superior maxilla; 12, frontomalar suture; 13, infraorbital groove; 14, antrum or maxillary sinus; 15, canal for anterior dental nerve and vessels exposed; 16, inferior meatus of nose; 17, alveolar process of the superior maxilla; 18, nasal surface of inferior turbinated bone; 19, groove for anterior palatine nerve and vessels; 20, palatal process of superior maxilla; 21, maxillary crest forming part of nasal septum; 22, vomer forming part of nasal septum.

Coronal Section of Skull

Shown is a coronal section passing inferiorly through interval between between the first and second…

An illustration of a plate.

Plate

An illustration of a plate.

Plate

An illustration of a plate.

Development of the spinal nerves. A, Formation of nerve roots. B, Formation of nerve trunk (N).C, Formation of nerves. D, E, Formation of subordinate branches. F, Formation of nerve trunks in relation to the limb: dorsal and ventral trunks corresponding to lateral and anterior trunks in D and E. Labels: D.R., dorsal root; A1.C., alimentary canal; V.R., ventral root; Ao, aorta; N.T., neural tube; V., cardinal vein; No., notochord, M.P., muscle plate; D.G., dorsal ganglion; Sy., sympathetic cord; W.D., wolffian duct; Co., coelom; So., somatic division; V1, visceral branch; P, posterior primary division; Lat, lateral branches; Ant., anterior branches.

Development of the Spinal Nerve

Development of the spinal nerves. A, Formation of nerve roots. B, Formation of nerve trunk (N).C, Formation…

During the reign of Queen Anne a valuable communion set was presented by her Majesty to the Mohawk chapel -- in other words, to her Majesty's loyal allies, the Mohawks, who at that time resided in the State of New-York.

Communion Plate Presented by Queen Anne

During the reign of Queen Anne a valuable communion set was presented by her Majesty to the Mohawk chapel…

Longitudinal Section of Horse Skull

Longitudinal section of a horse's skull. Labels: 1, supraoccipital bone and crest; 2, parietal bone;…

Screw Stock

"A handle for holding the threaded die by which the thread is cut on a bar, a nut, or a pipe; a die-stock;…

"The cutting-tool in a screw-cutting machine; a screw-plate." -Whitney, 1911

Screw Cutting Die

"The cutting-tool in a screw-cutting machine; a screw-plate." -Whitney, 1911

A section of a screw-cutting die.

Screw Die Section

A section of a screw-cutting die.

"Jewelers' box of dies, stocks, and taps (called a screw-plate set." -Whitney, 1911

Screw-Plate Set

"Jewelers' box of dies, stocks, and taps (called a screw-plate set." -Whitney, 1911

Tetraodontidae is a family of primarily marine and estuarine fish. The family includes many familiar species which are variously called puffers, balloonfish, blowfish, bubblefish, globefish, swellfish, toadfish, and toadies. They are morphologically similar to the closely related porcupinefish, which have large conspicuous spines (unlike the small, almost sandpaper-like spines of Tetraodontidae). The scientific name, Tetraodontidae, refers to the four large teeth, fused into an upper and lower plate, which are used for crushing the shells of crustaceans and mollusks, and red worms, their natural prey. Puffer Fish are the second most poisonous vertebrate in the world, the first being a Golden Poison Frog. The skin and certain internal organs of many Tetraodontidae are highly toxic to humans, but nevertheless the meat of some species is considered a delicacy in both Japan (as fugu) and Korea (as bok-uh). If one is caught while fishing, it is recommended that thick gloves are worn to avoid poisoning and getting bitten when removing the hook.

Blowfish

Tetraodontidae is a family of primarily marine and estuarine fish. The family includes many familiar…

An illustration of circular plaque decorated with a rosette.

Decorative Plaque

An illustration of circular plaque decorated with a rosette.

With the growth in size of the windows and the progressive suppression of the lateral walls of vaulted structures, stained glass came more and more generally into use. It stimulated the increase in the size of windows, and the suppression of the walls, and contributed greatly to the development of <em>tracery</em>. Its evolution can be traced from the simple coupling of twin windows under a single hood-mould or discharging arch (shown here), to the florid network of the fifteenth century.

Plate Tracery, Charlton-on-Oxmore

With the growth in size of the windows and the progressive suppression of the lateral walls of vaulted…

A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating the hours of the day. As the sun moves across the sky, the shadow-edge progressively aligns with different hour-lines on the plate. Such designs rely on the style being aligned with the axis of the Earth's rotation. Hence, if such a sundial is to tell the correct time, the style must point towards true North (not the north or south magnetic pole) and the style's angle with horizontal must equal the sundial's geographical latitude.

Sundial

A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal…

"Singer sewing-machine. a is the frame and cloth-plate or bed-plate; b, arm; c, treadle; e, pitman; d, main driving-wheel; f, band; g, small driving-wheel attached to shaft ... j, take-up lever with roller and stud; k, presser-bar carrying presser-foot; l, needle-bar; m, spool-pin; ... t, drawers." -Whitney, 1911

Singer Sewing Machine

"Singer sewing-machine. a is the frame and cloth-plate or bed-plate; b, arm; c, treadle; e, pitman;…

"Singer sewing-machine. a is the frame and cloth-plate or bed-plate; b, arm; ... g, small driving-wheel attached to shaft h; i, take-up cam with set-screw; j, take-up lever with roller and stud; ... m, spool-pin; n, shuttle-pitman taking motion from crank o; p, shuttle bell-crank; q, shuttle-carrier and shuttle; r, thread-guide; s, tension-disk ..." -Whitney, 1911

Singer Sewing Machine

"Singer sewing-machine. a is the frame and cloth-plate or bed-plate; b, arm; ... g, small driving-wheel…

An illustration of various sea urchin fossils. "1, Palaeechinus; Carboniferous; 2, A plate and radiole of Archaeolcidaris; 3, A radiole of Cidaris; Jurassic; 4, Hemicidaris; Mid. Jurassic; 5, Salenia; Cretaceous; 6, Dyaster; Jurassic; 7, Enallaster; Cretaceous; 8, Catopygus; Cretaceous." -Britannica, 1910

Sea Urchin Fossils

An illustration of various sea urchin fossils. "1, Palaeechinus; Carboniferous; 2, A plate and radiole…

An illustration of the plan of a strike fault. The fault surface is usually near vertical and the footwall moves either left or right or laterally with very little vertical motion. Strike-slip faults with left-lateral motion are also known as sinistral faults. Those with right-lateral motion are also known as dextral faults. A special class of strike-slip faults is the transform faults which are a plate tectonics feature related to spreading centers such as mid-ocean ridges.

Plan of a Strike Fault

An illustration of the plan of a strike fault. The fault surface is usually near vertical and the footwall…

"Rocaille coquille, book-plate ornamentation in varying forms of the scallop-shell upon rockwork." -Whitney, 1911

Rocaille Coquille

"Rocaille coquille, book-plate ornamentation in varying forms of the scallop-shell upon rockwork." -Whitney,…

The left war symbol has a border made of a copper plate engraving, designed by Heinrich Goltzius (1558-1617).

Left War Symbol

The left war symbol has a border made of a copper plate engraving, designed by Heinrich Goltzius (1558-1617).

The right war symbol has a border made of a copper plate engraving, designed by Heinrich Goltzius (1558-1617).

Right War Symbol

The right war symbol has a border made of a copper plate engraving, designed by Heinrich Goltzius (1558-1617).

The wrought-iron tomb cross was designed during the 18th century. Found in Thiengen, Germany, the center of the cross has a metal plate that contains an inscription.

Wrought-Iron Tomb Cross

The wrought-iron tomb cross was designed during the 18th century. Found in Thiengen, Germany, the center…

The wrought-iron tomb cross was designed during the 18th century. Found in Thiengen, Germany, the center of the cross has a metal plate that contains an inscription.

Wrought-Iron Tomb Cross

The wrought-iron tomb cross was designed during the 18th century. Found in Thiengen, Germany, the center…

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be placed.

Antique Candelabrum Capital

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be…

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be placed.

Antique Candelabrum Capital

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be…

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be placed.

Antique Candelabrum Capital

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be…

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be placed.

Antique Candelabrum Capital

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be…

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be placed.

Antique Candelabrum Capital

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be…

Antique Candelabrum Capital

The Antique candelabrum capital has a plate or cup like form on the top where a lamp or candle can be…

The Roman candelabrum capital is made out of marble and terminates with a plate or table on top.

Roman Candelabrum Capital

The Roman candelabrum capital is made out of marble and terminates with a plate or table on top.

The Renaissance candelabrum capital is made out of marble and terminates with a plate or table on top. It is intended for candles.

Renaissance Candelabrum Capital

The Renaissance candelabrum capital is made out of marble and terminates with a plate or table on top.…

Centipede

"A, a, Cephalic plate; b, Tergum of segment bearing first pair of legs (d); c, Tip of palpognath; e,…

An illustration of a female nautilus without the shell. "m, The dorsal "hood" formed by the enlargement of the outer or annular lobe of the forefoot, and corresponding to the sheaths of two tentacles; n. Tentacular sheaths of lateral portion of the annular lobe; u, The left eye; b, The nuchal plate, continuous at its right and left posterior angles with the root of the mid-foot, and corresponding to the nuchal cartilage of Sepia; c, Visceral hump; d, The free margin of the mantle-skirt,...; g.a, Points to the lateral continuation of the nuchal plate b to join the root of the mid foot of siphon." (Britannica, 1910).

Female Nautilus without Shell

An illustration of a female nautilus without the shell. "m, The dorsal "hood" formed by the enlargement…

In Wollaston's battery, the wooden box was replaced with an earthenware vessel, and a copper plate was bent into a U-shape, with a single plate of zinc placed in the center of the bent copper. The zinc plate was prevented from making contact with the copper by dowels (pieces) of cork or wood. In his single cell design, the U-shaped copper plate was welded to a horizontal handle for lifting the copper and zinc plates out out the electrolyte when the battery was not in use.

Wallaston's Battery

In Wollaston's battery, the wooden box was replaced with an earthenware vessel, and a copper plate was…

In Wollaston's battery, the wooden box was replaced with an earthenware vessel, and a copper plate was bent into a U-shape, with a single plate of zinc placed in the center of the bent copper. The zinc plate was prevented from making contact with the copper by dowels (pieces) of cork or wood. In his single cell design, the U-shaped copper plate was welded to a horizontal handle for lifting the copper and zinc plates out out the electrolyte when the battery was not in use.

Wallaston's Battery

In Wollaston's battery, the wooden box was replaced with an earthenware vessel, and a copper plate was…

The cell was set up in a glass, or glazed earthenware, pot. This contained the chromic acid solution, the carbon plate and a porous pot. Inside the porous pot was dilute sulfuric acid, the zinc rod, and a small quantity of mercury. The mercury formed an amalgam with the zinc and this reduced "local action", i.e. unwanted dissolution of the zinc when the cell was not in use.

Fuller Bichromate

The cell was set up in a glass, or glazed earthenware, pot. This contained the chromic acid solution,…

Now known as electrostatic generators, the Frictional electric machine produces static electricity at high voltage. "A, glass plate; B, rubber, holding amalgam; C, collecting points; D, prime conductor." -Whitney, 1911

Frictional Electric Machine

Now known as electrostatic generators, the Frictional electric machine produces static electricity at…

"An instrument for observing or detecting the existence of free electricity, and, in general, for determining its kind. ... In Volta's condensing electroscope, in place of the gilt knob there is a flat metal plate upon which rests another similar plate, which may be removed by an insulating handle." -Whitney, 1911

Condensing Electroscope

"An instrument for observing or detecting the existence of free electricity, and, in general, for determining…

An illustration showing the vibration of plates be using a rosined bow and a steel plate.

Vibration of Plates

An illustration showing the vibration of plates be using a rosined bow and a steel plate.

"A pipe of this nature fitted with a piece of glass so as to exhibit the reed (which is a "free reed") is shown in [the illustration]. Q is the wind-chest of the bellows, into which P is fitted. In the right-hand figure the upper part of the pope is removed, so as to show the reed more clearly. A plate of metal c c, has a slit but in it, in which the tongue I may just past. By means of a curved wire, r, projecting above the top of the pipe, and the play of the tongue may be controlled and the pipe tuned. The conical pipe, H, placed at the top, serves to increase the power of the sound". -Benson, 1891

Reed

"A pipe of this nature fitted with a piece of glass so as to exhibit the reed (which is a "free reed")…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

Apparatus for breaking a plate of glass by torsion, with an example of results produced.

Torsion Apparatus

Apparatus for breaking a plate of glass by torsion, with an example of results produced.

$Arrangement of fractures in a large plate of glass which was broken by torsion.$

Glass Broken by Torsion

Arrangement of fractures in a large plate of glass which was broken by torsion.

"Wire-gage, a gage for measuring the thickness of wire and sheet-metal. It is usually a plate of steel having round the edge a series of notches of standard opening." -Whitney, 1911

Wire Gauge

"Wire-gage, a gage for measuring the thickness of wire and sheet-metal. It is usually a plate of steel…

Whole Fish on a Plate

An illustration of a whole fish being served on a plate.

An illustration of a butter dish with a lid.

Butter in Dish with Lid

An illustration of a butter dish with a lid.

"Gauntlet of plate, early 14th century. In medieval armor, a glove of defense." -Whitney, 1911

Gauntlet of Plate

"Gauntlet of plate, early 14th century. In medieval armor, a glove of defense." -Whitney, 1911

"Gauntlet of plate, later 14th century. In medieval armor, a glove of defense." -Whitney, 1911

Gauntlet of Plate

"Gauntlet of plate, later 14th century. In medieval armor, a glove of defense." -Whitney, 1911

"There were on the breakfast table only a cornstarch pudding, a puny corn-ball, a muffin, some dandelions, a flat pickle, a sharp apple-pie, a tin plate, and iron spoon." -Trowbridge, 1866

Food Rebus

"There were on the breakfast table only a cornstarch pudding, a puny corn-ball, a muffin, some dandelions,…

"Plate, Argent. In addition to the foregoing tinctures, there are nine roundlets or balls used in Armory, the names of which are sufficient to denote their colour without expressing the same." -Hall, 1862

Roundlet Plate

"Plate, Argent. In addition to the foregoing tinctures, there are nine roundlets or balls used in Armory,…

Parts of the Gun

"Gun. A, breech; B, barrel; C, band; D, breech-block; E, butt; F, butt- or heel-plate; G, front sight…

"Field-gun Carriage. A, stock. B, cheek. a, lunette; b, trail-plate; c, c, pointing-rings; d, handle; e, e, prolonge-hooks; f, wheel-guard plate; g, lock-chain bolt, nut, and washer; h, turn buckle, chain, and hasp for sponge and rammer; i, stop for rammer-head; k, ear-plate for worm; l, elevating-screw; m, under-strap; n, implement-hook; o, D-ring for hand-spike; q, trunnion-plate; r, cap-square; s, s, cap-square chains and keys; 1, prolonge; 2, sponge and rammer; 3, hand-spike." -Whitney, 1911

Field Gun Carriage

"Field-gun Carriage. A, stock. B, cheek. a, lunette; b, trail-plate; c, c, pointing-rings; d, handle;…

This sideboard is inlaid with fine plate glass, and enriched by floral carvings in an Italian style. It is traditionally used in a dinning room for serving food.

Sideboard

This sideboard is inlaid with fine plate glass, and enriched by floral carvings in an Italian style.…

This dessert plate is hand painted with a design of fruit in the center.

Dessert Plate

This dessert plate is hand painted with a design of fruit in the center.

This cake plate is ornamented in single leaf style.

Cake Plate

This cake plate is ornamented in single leaf style.

Chandeliers

This chandelier is made out of brass. It has an elongated design with chains holding a plate at the…

"In the gold-leaf electroscope (invented by Bennet in 1787), two light strips of gold-leaf hang from the lower end of a metal rod, which passes vertically through an opening in the top of a glass bottle and expands above into a plate. If a piece of rubbed sealing-wax or other electrified body be brought near the plate, the gold leaves will repel each other and diverge ... A cylinder of wire gauze placed just inside the glass case, improves the action of the instrument." -Hazeltine, 1894

Gold Leaf Electroscope

"In the gold-leaf electroscope (invented by Bennet in 1787), two light strips of gold-leaf hang from…

The Wimshurst Machine is an electrostatic device to generate high voltages. "It consists of two circular glass plates, mounted on a common spindle, and capable of rotation in opposite directions with equal speeds. Each plate carries twelve or sixteen strips of thin sheet-metal, fixed radially at regular intervals apart ... At the extremities of the horizontal diameter of the plates the main conductors are placed, insulated on glass or vulcanite pillars." -Hazeltine, 1894

Wimshurst Machine

The Wimshurst Machine is an electrostatic device to generate high voltages. "It consists of two circular…