Imperial staircase to imperial staircases are more often of just two flights (hence the name) leaving the ground symmetrically to join one common destination. Occasionally, especially in the architecture of the Sicilian Baroque, they will leave the ground as one flight and then divide, but this is less common. One may also see an imperial staircase in the form of two flights rising to join and then continue as one flight, but this is rare. Imperial staircase An imperial staircase (sometimes erroneously known as a "double staircase") is the name given to a staircase with divided flights. Usually the first flight rises
Imperial units of 1858 transferred to The Crown the right to publish the official pharmacopoeia and to regulate apothecaries' weights and measures. Metric equivalents in this article usually assume the latest official definition. Before this date, the most precise measurement of the imperial Standard Yard was metres. In 1824, the various different gallons in use in the British Empire were replaced by the imperial gallon, a unit close in volume to the ale gallon. It was originally defined as the volume of of distilled water weighed in air with brass weights with the barometer standing at at a temperature of . In