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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]
Gabriel's horn is formed by taking the graph of =, with the domain and rotating it in three dimensions about the x axis. The discovery was made using Cavalieri's principle before the invention of calculus , but today, calculus can be used to calculate the volume and surface area of the horn between x = 1 and x = a , where a > 1 . [ 6 ]
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:
Horn & Hardart was a food services company in the United States noted for operating the first food service automats in Philadelphia, New York City, and Baltimore. [1] Philadelphia's Joseph Horn (1861–1941) and German-born, New Orleans-raised Frank Hardart (1850–1918) opened their first restaurant in Philadelphia, on December 22, 1888. The ...
The horn of the anvil is a conical projection used to form various round shapes and is generally unhardened steel or iron. The horn is used mostly in bending operations. It also is used by some smiths as an aid in "drawing down" stock (making it longer and thinner). Some anvils, mainly European, are made with two horns, one square and one round.
The bore of the French horn is small, between 10.8 and 11 mm, compared to 11.5 mm for the German horn, but not as small as the Vienna horn at 10.7 mm. These narrow-bore French instruments are equipped with piston valves (also called Périnet valves, after their inventor), unlike today's more usual orchestral (German) horns, which have rotary ...
The natural horn is a musical instrument that is the predecessor to the modern-day (French) horn (differentiated by its lack of valves). Throughout the seventeenth and eighteenth century the natural horn evolved as a separation from the trumpet by widening the bell and lengthening the tubes. [ 1] It consists of a mouthpiece, long coiled tubing ...
Nathan Manufacturing, Inc. is a division of Micro Precision Group which manufactures Airchime, Ltd. train horns mainly for North America. It is one of two major train horn manufacturers in the United States, with Leslie Controls, Inc. being the other. A K5LA (K-5LA) Horn on top of a Coaster San Diego Cabcar #2310.