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Cross-section of the Black Hills dome, showing the present structure and topography and the former continuation of the beds.

Black Hills Dome

Cross-section of the Black Hills dome, showing the present structure and topography and the former continuation…

A building which looks vaguely Middle Eastern.

Building

A building which looks vaguely Middle Eastern.

A farm building for housing poultry

Chicken Coop

A farm building for housing poultry

A structure raised above the roof of an edifice, a cupola.

Dome

A structure raised above the roof of an edifice, a cupola.

"A bundle of rods or small sticks of wood bound at both ends and in the middle, used in fortification, raising batteries, filling ditches, strengthening ramparts, and making parapets." -Whitney, 1911

Fascine

"A bundle of rods or small sticks of wood bound at both ends and in the middle, used in fortification,…

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block the splashing of water or mud.

Vehicle Fender

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block…

The forum was built on the order of Emperor Trajan with the spoils of war from the conquest of Dacia, which ended in 106. The Forum was built from a vast stoa-lined piazza measuring 660 by 390 feet (200 × 120 m) with exedrae on two sides. The Basilica Ulpia was an ancient Roman civic building located in the Forum of Trajan. It was named after Roman emperor Trajan whose full name was Marcus Ulpius Traianus.

Forum and Basilica of Trajan

The forum was built on the order of Emperor Trajan with the spoils of war from the conquest of Dacia,…

A cross-section of a hen-house.

Cross-section of a hen-house

A cross-section of a hen-house.

Front view of a hen-house.

Front view of a hen-house

Front view of a hen-house.

The Pompeiian house consisted of several courts or <em>atria</em>, some of which were surrounded by colonnades and called peristyles. The front portion was reserved for shops, or presented to the street a wall unbroken save by the entrance. Legend: s, shops; v, vestibule; f, family rooms; k, kitchen; l, lararium; p, peristyles

House of Pansa, Pompeii (Plan)

The Pompeiian house consisted of several courts or atria, some of which were surrounded by…

the term light hull is used to describe the outer hull of a submarine, which houses the pressure hull, providing hydro dynamically efficient shape

Submarine Hull

the term light hull is used to describe the outer hull of a submarine, which houses the pressure hull,…

"It was in Central France, and mainly along the Loire, that the systematic development of vaulted church architecture began. Naves covered with barrel-vaults, sometimes of pointed section, appear in a number of large churches built during the eleventh and twelfth centuries, with apsidal and transeptal chapels and aisles carried around the apse, as in Notre-Dame du Port at Clermont-Ferrand. The thrust of these ponderous vaults was clumsily resisted by half-barrel vaults over the side aisles, transmitting the strain to massive side-walls."

Section of Notre-Dame du Port

"It was in Central France, and mainly along the Loire, that the systematic development of vaulted church…

"Shows the powerful legs, small feet, and rudimentary wings of the bird; the obliquity at which the bones of the legs and wings are placed, and the comparatively small angles which two bones make at their point of junction."&mdash;Pettigrew, 1857

Skeleton of Ostrich

"Shows the powerful legs, small feet, and rudimentary wings of the bird; the obliquity at which the…

A small structure away from a main building used as a bathroom.

Outhouse

A small structure away from a main building used as a bathroom.

A rear and side view of an outhouse.

Outhouse

A rear and side view of an outhouse.

"Under the power of about 90 diameters the general character of the peridia is seen. They are densely aggregated, elongated, submerged, pale-brown, irregularly torn. The sporidia are copius...Nos. 1 and 2, indicate the general points of growth of this fungus. I find frequently on the leaf-ribs and terminal points of the leaves, and very often dispersed over the smooth parts of the leaf; sometimes, although rarely, the peridia are on the upper surface which, when matured, resembles net work. At the juncture of the leaf (see 4) the cells of the peridia are nearly round, at 5, oblong. From 3 to 4 the cellular structure is of light Vandyke brown; at 5, a pale yellow...6 represents the appearance of the peridia as see by the naked eye; 7, their general arrangements and their groupings on the leaves; 8, three cells, showing the parts of which the peridia are composed being magnified about 125 diameters." -Watts, 1874

Cellular structure of peridia

"Under the power of about 90 diameters the general character of the peridia is seen. They are densely…

"It is not unusual to fine a decayed spot in the center of potatoes otherwise apparently in good condition. A microscopic examination a portion of the diseased part will show that the decay commenced where the vascular bundles concentrate. At that point the air is in greater volume than elsewhere. Although these mineral acids and caustic alkalies dissolve starch granuals, they do not affect the cellulose cells which contain the starch. When such spots are exposed to the atmosphere the fungus blue-mold forms on the surface. This disease, therefore, has not relation to potato-rot, as ordinarily understood. f represents the mycelium (roots) of blue-mold, Penicillium glaucum, and G that of potato-rot, Peronospora infestans." -Watts, 1874

Potato Diseases at a Microscopic Level

"It is not unusual to fine a decayed spot in the center of potatoes otherwise apparently in good condition.…

"It is a gorgeous structure decorated with statues, carvings, and gold leaf, situated close by the Thiergarten." &mdash;Carpenter, 1902

Reichstag

"It is a gorgeous structure decorated with statues, carvings, and gold leaf, situated close by the Thiergarten."…

Diagrammatic sections to represent the development of the Rhine Graben and its present structural and topographic features.

Rhine Graben

Diagrammatic sections to represent the development of the Rhine Graben and its present structural and…

"It was in Central France, and mainly along the Loire, that the systematic development of vaulted church architecture began. Naves covered with barrel-vaults, sometimes of pointed section, appear in a number of large churches built during the eleventh and twelfth centuries, with apsidal and transeptal chapels and aisles carried around the apse, as in the imposing church of St. Sernin at Toulouse, in Provence. The thrust of these ponderous vaults was clumsily resisted by half-barrel vaults over the side aisles, transmitting the strain to massive side-walls."

Plan of St. Sernin, Toulouse

"It was in Central France, and mainly along the Loire, that the systematic development of vaulted church…

"Hornets and wasps and their structures." &mdash; Goodrich, 1859

Structures of hornets and wasps

"Hornets and wasps and their structures." — Goodrich, 1859

The Temple of Venus and Roma (Latin: Templum Veneris et Romae) was the largest known temple in Ancient Rome. Located at the far east side of the Forum Romanum near the Colosseum, it was dedicated to the goddesses Venus Felix (Venus the Bringer of Good Fortune) and Roma Aeterna (Eternal Rome). The architect was the emperor Hadrian. Construction of the temple began in 121. It was officially inaugurated by Hadrian in 135, and finished in 141 under Antoninus Pius. Damaged by fire in 307, it was restored with alterations by the emperor Maxentius.

Temple of Venus and Roma, Plan

The Temple of Venus and Roma (Latin: Templum Veneris et Romae) was the largest known temple in Ancient…

Illustration of a restored atrium and peristylium of the House of Pansa at Pompeii. The impluvium, pool, sits in the center of the atrium. The peristyle can be seen in the background. Four entrances to cubicula are pictured, as well as the entrances to oecus and andron. Two Ionic columns are visible in the opening between the atrium and peristyle. Four statues line the atrium.

The Interior (Atrium and Peristylium) of Pansa's house at Pompeii, Restored

Illustration of a restored atrium and peristylium of the House of Pansa at Pompeii. The impluvium, pool,…

The Baths of Caracalla were Roman public baths, or therm&aelig;, built in Rome between AD 212 and 216, during the reign of the Emperor Caracalla. The extensive ruins of the baths have become a popular tourist attraction.

Thermæ of Caracalla, Plan of Central Block

The Baths of Caracalla were Roman public baths, or thermæ, built in Rome between AD 212 and 216,…

A device fitted to a pipeline or orifice in which the closure member is either rotated or moved in some way as to control or stop flow.

Mechanical Valve

A device fitted to a pipeline or orifice in which the closure member is either rotated or moved in some…

A section of a human vertebra, showing structure.

Section of Vertebra

A section of a human vertebra, showing structure.