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From Tuer 's History of the Horn-Book. A hornbook ( horn-book) is a single-sided alphabet tablet, which served from medieval times as a primer for study, [1] and sometimes included vowel combinations, numerals or short verse. [2] The hornbook was in common use in England around 1450, [3] but may have originated more than a century earlier. [4]
Bone, antler, and horn create relatively durable items; long bones (femurs, phalanges, etc.) and antlers provide the most versatile working material for many tools, but all parts of a skeleton can be worked. Horn has numerous applications, from medieval hornbooks to 19th-century hair ornaments and more.
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The first modern horn antenna in 1938 with inventor Wilmer L. Barrow. A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz. [1]
B♭ alto — up a perfect fourth. A — up a major third. G — up a major second. E — down a minor second. E♭ — down a major second (used for horn on pitches with multiple sharps until Richard Strauss) D — down a minor third. C — down a perfect fourth. B♭ basso — down a perfect fifth. Some less common transpositions include:
Ron Arad was awarded the Royal Designer for Industry (RDI) in 2002 and the London Design Medal in 2011. [citation needed] He was Professor of Design at the Hochschule in Vienna from 1994 to 1997, and later Professor of Design Products at the Royal College of Art in London up until 2009, when he was made Professor Emeritus.
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