Ceiling in the context of "Stalagmite"

A pair of decorated ceilings in the main Central Hall (officially Hintze Hall since 2014) and smaller North Hall of the Natural History Museum in South Kensington, London, were unveiled at the building's opening in 1881. They were designed by the museum's architect Alfred Waterhouse and painted by the artist Charles James Lea. The ceiling of the Central Hall consists of 162 panels, 108 of which depict plants considered significant to the history of the museum, to the British Empire or the museum's visitors and the remainder are highly stylised decorative botanical paintings. The ceiling of the smaller North Hall consists of 36 panels, 18 of which depict plants growing in the British Isles. Painted directly onto the plaster of the ceilings, they also make use of gilding for visual effect.

The natural history collections had originally shared a building with their parent institution the British Museum, but with the expansion of the British Empire there was a significant increase in both public and commercial interest in natural history, and in the number of specimens added to the museum's natural history collections. In 1860 it was agreed that a separate museum of natural history would be created in a large building, capable of displaying the largest specimens, such as whales. The superintendent of the natural history departments, Richard Owen, envisaged that visitors would enter a large central hall containing what he termed an "index collection" of representative exhibits, from which other galleries would radiate, and a smaller hall to the north would display the natural history of the British Isles. Waterhouse's Romanesque design for the museum included decorative painted ceilings. Acton Smee Ayrton, the First Commissioner of Works, refused to permit the decoration of the ceilings on grounds of cost, but Waterhouse convinced him that provided the painting took place while the scaffolding from the museum's construction was still in place it would incur no extra cost; he further managed to convince Ayrton that the ceiling would be more appealing if elements of the paintings were gilded.

A wall is a structure and a surface that defines an area; carries a load; provides security, shelter, or soundproofing; or serves a decorative purpose. There are various types of walls, including border barriers between countries, brick walls, defensive walls in fortifications, and retaining walls that hold back dirt, stone, water, or noise. Walls can also be found in buildings, where they support roofs, floors, and ceilings, enclose spaces, and provide shelter and security.

The construction of walls can be categorized into framed walls and mass-walls. Framed walls transfer the load to the foundation through posts, columns, or studs and typically consist of structural elements, insulation, and finish elements. Mass-walls are made of solid materials such as masonry, concrete, adobe, or rammed earth. Walls may also house utilities like electrical wiring or plumbing and must conform to local building and fire codes.

Ovid Among the Scythians is the title of two oil paintings by the French artist Eugène Delacroix, executed in 1859 and 1862. The less famous second version was painted to integrate the figures and landscape and rectified the problems of scale of the first version, which had an unusual composition and strange scale of the characters, provoking negative criticism, even among Delacroix's admirers such as Charles Baudelaire and Théophile Gautier, although artists such as Edgar Degas were deeply impressed.

Delacroix painted this subject first in 1844 as part of the decorations for the ceiling of the Library of the Palais Bourbon in Paris, in a painting there titled Ovid Chez Les Barbares. They depict the life of the Ancient Roman poet Ovid when exiled by the Emperor Augustus to the Black Sea port of Tomis, in what was then part of Scythia and is now south-east Romania, where he spent his last eight years and wrote poems such as Tristia and Epistulae ex Ponto. The Scythians were an ancient Iranic people whose way of life was described by Herodotus in his Histories as "nomadic"; Ovid himself called them a "wild tribe".

A fire extinguisher is a handheld active fire protection device usually filled with a dry or wet chemical used to extinguish or control small fires, often in emergencies. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the equipment, personnel, resources or expertise of a fire brigade. Typically, a fire extinguisher consists of a hand-held cylindrical pressure vessel containing an agent that can be discharged to extinguish a fire. Fire extinguishers manufactured with non-cylindrical pressure vessels also exist, but are less common.

There are two main types of fire extinguishers: stored-pressure and cartridge-operated. In stored-pressure units, the expellant is stored in the same chamber as the firefighting agent itself. Depending on the agent used, different propellants are used. With dry chemical extinguishers, nitrogen is typically used; water and foam extinguishers typically use air. Stored pressure fire extinguishers are the most common type. Cartridge-operated extinguishers contain the expellant gas in a separate cartridge that is punctured before discharge, exposing the propellant to the extinguishing agent. This type is not as common, used primarily in areas such as industrial facilities, where they receive higher-than-average use. They have the advantage of simple and prompt recharge, allowing an operator to discharge the extinguisher, recharge it, and return to the fire in a reasonable amount of time. Unlike stored pressure types, these extinguishers use compressed carbon dioxide instead of nitrogen, although nitrogen cartridges are used on low-temperature (–60 rated) models. Cartridge-operated extinguishers are available in dry chemical and dry powder types in the U.S. and water, wetting agent, foam, dry chemical (classes ABC and B.C.), and dry powder (class D) types in the rest of the world.

A glazier is a tradesperson responsible for cutting, installing, and removing glass (and materials used as substitutes for glass, such as some plastics). They also refer to blueprints to figure out the size, shape, and location of the glass in the building. They may have to consider the type and size of scaffolding they need to stand on to fit and install the glass. Glaziers may work with glass in various surfaces and settings, such as cutting and installing windows, doors, shower doors, skylights, storefronts, display cases, mirrors, facades, interior walls, ceilings, and tabletops.

A painted ceiling is a ceiling covered with an artistic mural or painting. They are usually decorated with fresco painting, mosaic tiles and other surface treatments. While hard to execute (at least in situ) a decorated ceiling has the advantage that it is largely protected from damage by fingers and dust. In the past, however, this was more than compensated for by the damage from smoke from candles or a fireplace. Many historic buildings have celebrated ceilings, perhaps the most famous in the world is the Sistine Chapel ceiling by Michelangelo.

A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. It may also be referred to as a drop ceiling, T-bar ceiling, false ceiling, suspended ceiling, grid ceiling, drop in ceiling, drop out ceiling, or ceiling tiles and is a staple of modern construction and architecture in both residential and commercial applications.