Tonnage and poundage Tonnage and poundage Tonnage and Poundage were certain duties and taxes first levied in Edward II's reign on every tun (cask) of imported wine, which came mostly from Spain and Portugal, and on every pound weight of merchandise exported or imported. Traditionally tonnage and poundage was granted by Parliament to the king for life until the reign of Charles I. Tonnage and poundage were swept away by the Customs Consolidation Act of 1787. Charles I's first Parliament, known as the Useless Parliament, broke with tradition and granted the king tonnage and poundage for a year rather than life out of
1/3–2/3 conjecture the partial order place "x" earlier than "y". The partial order formed by three elements "a", "b", and "c" with a single comparability relationship, has three linear extensions, and In all three of these extensions, "a" is earlier than "b". However, "a" is earlier than "c" in only two of them, and later than "c" in the third. Therefore, the pair of "a" and "c" have the desired property, showing that this partial order obeys the 1/3–2/3 conjecture. This example shows that the constants 1/3 and 2/3 in the conjecture are tight; if "q" is any fraction strictly between 1/3