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Ogee
An architectural element having a convex cove joined to a concave nose that produces an “S” profile.
Oil Lighting
Oil or “fluid-fuel” lighting has its origins in prehistory. There are examples of oil lamps from some of the earliest human civilizations. The basic form of the oil lamp was, for thousands of years, a shell or stone dish of molten animal fat or vegetable oil with some vegetable wick such as papyrus, rush, or linen. As in a candle, the heat of the flame draws the fuel up the wick through capillary action where it is burned. Oil lamps went through many improvements over the centuries, but leapt forward with Aime Argand’s invention of the circular tube wick that drafted air from underneath, both around and through the wick tube. The additional oxygen at the flame produced an intense bright light.
Opaline Glass
A type of glass used in lighting fixture shade production that has a cloudy blue or grayish opal translucence and a slight iridescence. Opaline glass was widely used in the production of cast glass domes that were meant to imitate carved alabaster.
Ormolu
Literally “gold-like,” a French term for a type of cast bronze ornament that is finished by hand-chasing and surfaced with gold. Also known as gilt-bronze or bronze dore. The term is often used to refer to bronze furniture mounts that have been enhanced by gilding.