If the Duchamp urinal is art, then anything is. But there has to be consensus about good art among informed people -- artists, dealers, curators, collectors. Somebody has to be the first to say something is good, but if you put it up the flagpole and nobody salutes it, then there's nothing there. WILLIAM RUBIN
Conventional eight groove rifling on the left, and octagonal rifling on the right. Polygonal rifling /pÉËlÉªÉ¡ÉnÉl/ is a type of gun barrel rifling where the traditional lands and grooves are replaced by hills and valleys in a rounded polygonal pattern, usually taking the form of a hexagon or octagon.n the Glock pistol, for instance, octagonal rifling is used in the large diameter .45 ACP bore, which has an 11.23 mm (0.442 in) diameter, since it resembles a circle more closely than the hexagonal rifling used in smaller diameter bores.
columnar jointing. (geology). Parallel, prismatic columns that are formed as a result of contraction during cooling in basaltic flow and other extrusive and intrusive rocks.Also known as columnar structure; prismatic jointing; prismatic structure.1  Facebook.geology). Parallel, prismatic columns that are formed as a result of contraction during cooling in basaltic flow and other extrusive and intrusive rocks. Also known as columnar structure; prismatic jointing; prismatic structure.