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A building's surface detailing, inside and outside, often includes decorative moulding, and these often contain ogee-shaped profiles—consisting (from low to high) of a concave arc flowing into a convex arc, with vertical ends; if the lower curve is convex and higher one concave, this is known as a Roman ogee, although frequently the terms are used interchangeably and for a variety of other ...
Egg-and-dart molding at the top of an Ionic capital at the Jefferson Memorial. Egg-and-dart, also known as egg-and-tongue, egg-and-anchor, or egg-and-star, [1] is an ornamental device adorning the fundamental quarter-round, convex ovolo profile of moulding, consisting of alternating details on the face of the ovolo—typically an egg-shaped object alternating with a V-shaped element [1] (e.g ...
Cyma: Moulding of double curvature, combining the convex ovolo and concave cavetto. When the concave part is uppermost, it is called a cyma recta but if the convex portion is at the top, it is called a Cyma reversa (See diagram at Ogee.) When crowning moulding at the entablature is of the cyma form, it is called a cymatium. [7]
Longcase clocks (grandfather clocks) typically use Roman numerals for the hours. Clocks using only Arabic numerals first began to appear in the mid-18th century. [citation needed] The clock face is so familiar that the numbers are often omitted and replaced with unlabeled graduations (marks), particularly in the case of watches. Occasionally ...
Example of a non-filleted pole (left) and a filleted pole (right) It is common to find a fillet where two parts are welded together. In mechanical engineering, a fillet (pronounced / ˈ f ɪ l ɪ t /, like "fill it") is a rounding of an interior or exterior corner of a part. An interior or exterior corner, with an angle or type of bevel, is ...
In 1956, "Phase Diagrams for Ceramists" was published the first time, containing a collection of phase diagrams. [2] This database is known today as "Phase Equilibria Diagrams". [3] in 1983, the "Handbook of Glass Data" was published, [4] followed by the creation of the Japanese database Interglad in 1991. [5]
A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance, and as a cover for a beaker. When used to cover beakers, the purpose is generally to prevent dust or other particles from entering the beaker; the watch glass does ...