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The furrows and lands are arranged in repeating patterns called harps. A typical millstone will have six, eight or ten harps. The pattern of harps is repeated on the face of each stone, when they are laid face to face the patterns mesh in a kind of "scissoring" motion creating the cutting or grinding function of the stones.
A cross-section of an ear of corn, showing the cob. A corncob, also called corn cob or cob of corn, is the hard core of an ear of maize, bearing the kernels, made up of the chaff, woody ring, and pith. Corncobs contain mainly cellulose, hemicellulose, and lignin. [1]
Celtic mazes are straight-line spiral key patterns that have been drawn all over the world since prehistoric times. The patterns originate in early Celtic developments in stone and metal-work, and later in medieval Insular art. Prehistoric spiral designs date back to Gavrinis (c. 3500 BCE). [1]
H-beam, a beam with H-shaped section; Goals in several sports (gridiron football (old style), Gaelic football, rugby, hurling) are described as "H-shaped" H topology in electronic filter design; Also see Balbis; I-shape, the shape that resembles the capital letter Ɪ in a serif font, i.e., with horizontal strokes Ɪ-beam, a beam with an ...
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A typical cross-section drawing of a roadway. For centuries, until the 1970s, all engineering drawing was done manually by using pencil and pen on paper or other substrate (e.g., vellum , mylar ). Since the advent of computer-aided design (CAD), engineering drawing has been done more and more in the electronic medium with each passing decade.
Knot patterns first appeared in the third and fourth centuries AD and can be seen in Roman floor mosaics of that time. Interesting developments in the artistic use of interlaced knot patterns are found in Byzantine architecture and book illumination , Coptic art , Celtic art, Islamic art , Kievan Rus' book illumination, Ethiopian art , and ...
This Halloween 2024, use these printable pumpkin stencils and free, easy carving patterns for the scariest, silliest, most unique, and cutest jack-o’-lanterns. These 55 Printable Pumpkin ...