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Both a full quatrefoil, and a partial portrayal of quatrefoil are found on monuments here. In the latter case, one half of a quatrefoil represents the opening of a cave where an important personage is seated. This cave opening represents a water source. Thus, quatrefoil seems to be associated with water rituals.
A foil is an architectural device based on a symmetrical rendering of leaf shapes, defined by overlapping circles of the same diameter that produce a series of cusps to make a lobe. Typically, the number of cusps can be three ( trefoil ), four ( quatrefoil ), five (cinquefoil [ 1 ] ), or a larger number (multifoil). [ 2 ]
Multifoil arch in the Aljafería, Zaragoza, Spain. A multifoil arch (or polyfoil arch), also known as a cusped arch, [1] [2] polylobed arch, [3] [4] or scalloped arch, [5] is an arch characterized by multiple circular arcs or leaf shapes (called foils, lobes, or cusps) that are cut into its interior profile or intrados.
Foil stamping, a printmaking technique; Foil (fencing), one of the three weapons used in modern fencing; Foil (fiction), a subsidiary character who emphasizes the traits of a main character Comedic or comic foil, the straight man in a comedy double act "Foil" (song), "Weird Al" Yankovic's parody of Lorde's song "Royals"
Don Quixote and his sidekick Sancho Panza, as illustrated by Gustave Doré: the characters' contrasting qualities [1] are reflected here even in their physical appearances. In any narrative, a foil is a character who contrasts with another character, typically, a character who contrasts with the protagonist, in order to better highlight or differentiate certain qualities of the protagonist.
[4] [5] Between 1899 and 1901, British boat designer John Thornycroft worked on a series of models with a stepped hull and single bow foil. In 1909 his company built the full scale 22-foot (6.7 m) long boat, Miranda III. Driven by a 60 hp (45 kW) engine, it rode on a bowfoil and flat stern.
Foils are used on wind-surfboards through design development from Neil Pryde Maui, inventors of hydrofoil sailing "windsurfing" boards. [citation needed] Using a moderately sized sail, a foil windboard can achieve speeds over 6 knots faster than the apparent wind. With advancements in hydrofoil design the energy required to stay on foil was ...
Of the tested foils, 46% of the samples were found to have the desired purity requirement of 99.9% silver, whereas the rest had less than 99.9% silver. All the tested Indian foils contained on average trace levels of nickel (487 ppm), lead (301 ppm), copper (324 ppm), chromium (83 ppm), cadmium (97 ppm) and manganese (43 ppm). All of these are ...