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Illustration of an aerial view of an 11th century Norman castle in Europe. From this view, it is possible to see the outer wall, moat, outer and inner courts, the keep, turrets, stables and other interior buildings. There is a palisade of stakes around the moat.

An 11th Century Norman Castle, Aerial View

Illustration of an aerial view of an 11th century Norman castle in Europe. From this view, it is possible…

Burglar alarms like this one are designed to alert the user to danger. Sensors are connected to a control unit through a low voltage wiring that interacts with a response device.

Burglar Detention Alarm

Burglar alarms like this one are designed to alert the user to danger. Sensors are connected to a control…

The process of physically assembling a book from a number of folded or unfolded sheets of paper or other material. It usually involves attaching covers to the resulting text-block.

Book Binding

The process of physically assembling a book from a number of folded or unfolded sheets of paper or other…

A breastplate is a device worn over the torso either to protect the torso from injury, or as an item of religious significance, or as an item of status.

Breastplate

A breastplate is a device worn over the torso either to protect the torso from injury, or as an item…

"Then the king arose very early in the morning, and went in haste unto the den of lions. And when he came near unto the den to Daniel, he cried with a lamentable voice; the king spake and said to Daniel, O Daniel, servant of the living God, is thy God, whom thou servest continually, able to deliver thee from the lions? Then said Daniel unto the king, O king, live for ever. My God hath sent his angel, and hath shut the lions' mouths, and they have not hurt me; forasmuch as before him innocency was found in me; and also before thee, O king, have I done no hurt. Then was the king exceeding glad, and commanded that they should take Daniel up out of the den. So Daniel was taken up out of the den, and no manner of hurt was found upon him, because he had trusted in his God." Daniel 6:19-23 ASV <p>Illustration of Daniel standing in the lions' den. An angel protects him from the lions.

Daniel in the Lions' Den

"Then the king arose very early in the morning, and went in haste unto the den of lions. And when he…

Armed robbery is less likely to happen than burglary, but it is a more dangerous threat to you, your employees, and your customers. Robbers choose targets that have cash readily available, accessible, and have loose security procedures. Even with the best precautions, robberies still occur

Device for Protection Against Robbers

Armed robbery is less likely to happen than burglary, but it is a more dangerous threat to you, your…

An illustration of a draw bridge.

Draw Bridge

An illustration of a draw bridge.

"So he went and did according unto the word of Jehovah; for he went and dwelt by the brook Cherith, that is before the Jordan." I Kings 17:5 ASV <p>Illustration of two separate, but related scenes in which Elijah hides by the brook at Cherith. In the image on the left, he is reclining on a rock and there are trees behind and above him. He reaches out to a raven with a piece of bread in its beak. In the image on the right, he appears to be asleep while leaning on a rock. A jar and a piece of bread are on the rock. An angel hovers above him.

Elijah Hides from Ahab and is Fed by Angels and Ravens

"So he went and did according unto the word of Jehovah; for he went and dwelt by the brook Cherith,…

A funnel-shaped piece of brass is placed over the ends of a galvanometer when the resistance is equal to that of the pile. This acts as a preservative for the junctions from the heat radiated by the surrounding objects.

Funnel-shaped Brass

A funnel-shaped piece of brass is placed over the ends of a galvanometer when the resistance is equal…

"Fuse protection on instrument circuit of an alternating-current switchboard." &mdash;Croft 1920

Fuse Protection on Alternating Current Switchboard

"Fuse protection on instrument circuit of an alternating-current switchboard." —Croft 1920

"Illustrating fuse protection for voltmeter and ground detector and ground detector on a direct-current switchboard." &mdash;Croft 1920

Fuse Protection on Direct Current Swtichboard

"Illustrating fuse protection for voltmeter and ground detector and ground detector on a direct-current…

A gabion is an open cylinder made of brushwood, canvas, wire-netting, or iron bands used in fortification. Filled with loose earth, gabions are placed on end, in tiers, to form a wall behind which earth can be piled. They are usually constructed on location and made up of whatever materials are on hand.

Gabion

A gabion is an open cylinder made of brushwood, canvas, wire-netting, or iron bands used in fortification.…

Heidi and Peter. Heidi is trying to prevent Peter from harming the goat.

Boy and Girl

Heidi and Peter. Heidi is trying to prevent Peter from harming the goat.

A man standing in an armored lookout.

An Armored Lookout

A man standing in an armored lookout.

An illustration of a mortar and mount.

Mortar & Mount

An illustration of a mortar and mount.

Illustration of the Norman-built Rochester castle. The architect of the castle was Gundulf, a Norman monk, and the castle protected England's southeast coast. It is a view of the castle from the northwest and two of its towers are visible. There is a road leading away from the castle. A woman and a child holding hands, walk down the road. Trees line the road.

Rochester Castle as Seen from the Northwest

Illustration of the Norman-built Rochester castle. The architect of the castle was Gundulf, a Norman…

Protective covering that protects something from direct sunlight.

Shade Roller

Protective covering that protects something from direct sunlight.

Screen to keep insects from entering a building through the open window

Window Screen

Screen to keep insects from entering a building through the open window

Screen to keep insects from entering a building through the open window

Window Screen

Screen to keep insects from entering a building through the open window

Lampshades are a fixture that covers the lightbulb on a lamp to diffuse the light it emits. Conical, cylindrical and other forms on floor-, desk- or table top-mounted as well as suspended lamp models are the most common and are made in a wide range of materials.

Lamp Shade

Lampshades are a fixture that covers the lightbulb on a lamp to diffuse the light it emits. Conical,…

An illustration of a group of slaves fleeing from Army.

Slaves Fleeing from Army

An illustration of a group of slaves fleeing from Army.

Lictors were guards of magistrates who carried fasces to show power to execute. Two men, one young, one older, stand side by side, each holding fasces. Fasces are axes bound to bundles of wooden rods. These lictors function as bodyguards. The men are wearing togas.

Two Attendants, or Lictors, of a King or Consul

Lictors were guards of magistrates who carried fasces to show power to execute. Two men, one young,…

An illustration of a black umbrella with a curved handle.

Black Umbrella with Curved Handle

An illustration of a black umbrella with a curved handle.