Labels:baseball bat | bulletin board | hakham | paper | sky | teddy bear | vegetarianism OCR: FACTS BOX NAME: VALVE TROMBONE FAMILY: Brass BRAS PITCH RANGE- Around two-and-a-half octaves COMPLETE MATERIAL: Brass. RANGE SIZE: About 3ft 4 in (1 long total length of unwound tube 1m ORIGINS: This trombone emerged during the 1820s in Vienna, when makers throughout Europe were experimenting with the revolutionary new idea of valves CLASSIFICAT ION: Aerophone: an instrument that produces Its sound by the vibration ot column of air DID YO}U KNOW: The slide trombone was difficult to play on horseback $o valve trom bones were introduced to cavalry bands COMPLET Iength exper enting difficul