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"Courtney's Automatic Buoy. A, cylinder, 27 ft. 6 in. long; B, mooring shackle; C, rudder; D, buoy; E, diaphragm; F, ball valves; G, air inlet tubes; H, air (compressed) outlet tube to whistle; I, compressed air inlet to buoy; K, manhole; L, steps; N, whistle." —The Encyclopedia Britannica, 1910

Automatic Buoy

"Courtney's Automatic Buoy. A, cylinder, 27 ft. 6 in. long; B, mooring shackle; C, rudder; D, buoy;…

"Beacons in exposed situations are constructed sometimes of stone, and cement-concrete or cement-rubble, but generally of castiron columns let into heavy base plates which are fixed to the rock by strong lewis bats. The small class iron beacons are generally of malleable iron and the larger of cast-iron butt steel or bronze might with advantage be used in very exposed places." —The Encyclopedia Britannica, 1910

Beacon

"Beacons in exposed situations are constructed sometimes of stone, and cement-concrete or cement-rubble,…

A headlamp is attached to the front of a bicycle while illuminating the road ahead specially when there is low visibility.

Bicycle Lamp

A headlamp is attached to the front of a bicycle while illuminating the road ahead specially when there…

An arc lamp or arc light is the general term for a class of lamps that produce light by an electric arc. The lamp consists of two electrodes, typically made of tungsten, which are separated by a gas.

Electric Arc Lamp

An arc lamp or arc light is the general term for a class of lamps that produce light by an electric…

A lampshade is a fixture that covers the light bulb 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.

Incandescent Lampshade

A lampshade is a fixture that covers the light bulb on a lamp to diffuse the light it emits. Conical,…

This collapsible magic lantern is an early form of a slide projector, also known as the ancestor of the modern slide projector; used for projecting images painted on glass with translucent colors. Composed of a light source which, in the early lanterns was candlestick. The magic lantern was also known a a light projector of a positive image from a glass plate. These images were used for lantern slides and were traditionally drawn or stenciled on. This lantern can collapse in on itself saving two and a half times its original size.

Collapsible Magic Lantern

This collapsible magic lantern is an early form of a slide projector, also known as the ancestor of…

A common railway signal.

Train Signal

A common railway signal.

A common railway signal.

Train Signal

A common railway signal.

A common railway signal.

Train Signal

A common railway signal.

A common railway signal.

Train Signal

A common railway signal.