. . . . "Gerb (pyrotechnic)"@en . . . . "A gerb is a type of firework which produces a jet of sparks, usually lasting between 15 and 60 seconds. It is a thick-walled tube filled with pyrotechnic composition and possessing a choke, which is a narrowing in the tube. Gerbs are often referred to as 'fountains'. Sometimes a small charge of black powder is added to the bottom of a gerb to make it finish with a bang: this charge is known as the 'bounce'. These are commonly used at sporting events. Gerbs are usually measured in terms of time and height. For example, a 4\u00D74 burns for 4 seconds at a height of 4 feet."@en . . . . . . . . . "A gerb is a type of firework which produces a jet of sparks, usually lasting between 15 and 60 seconds. It is a thick-walled tube filled with pyrotechnic composition and possessing a choke, which is a narrowing in the tube. Gerbs are often referred to as 'fountains'. Sometimes a small charge of black powder is added to the bottom of a gerb to make it finish with a bang: this charge is known as the 'bounce'. These are commonly used at sporting events. Gerbs intended for use indoors near a proximate audience, such as at a rock concert, typically have shorter durations (from 1\u20448 to 30 seconds) and heights (4 to 50 feet). Gerbs are usually measured in terms of time and height. For example, a 4\u00D74 burns for 4 seconds at a height of 4 feet. Eric Newby's book The Last Grain Race (chapter two: \"Mountstewart\") contains a 1938 reference to what appears to be the original gerb\u2014in effect a mortar bomb fired from a mortar."@en . . . "1197"^^ . "1017167975"^^ . . . . . . . . . . "434311"^^ . . . . . . . . .