GAS Gas lighting of buildings and streets began early in the 19th century, with most streets in London lit by gas as early as 1816. But for the first 50 years it was generally distrusted and few homes were lit.After gas fittings were introduced in the new Houses of Parliament in 1859 the tide turned.AS Gas lighting of buildings and streets began early in the 19th century, with most streets in London lit by gas as early as 1816. But for the first 50 years it was generally distrusted and few homes were lit.
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Arc of a Circle. A connected section of the circumference of a circle. Arcs are measured in two ways: as the measure of the central angle, or as the length of the arc itself. Measurement by central angle. (degrees) The red arc (minor arc) measures 120Â°. The blue arc (major arc) measures 240Â°.