Imperial and US customary measurement systems in 1824, to take effect in 1826) and United States customary units which evolved from English Units from 1776 onwards. The earliest records of English units of measure involve the weight (and therefore the value) of Saxon coins. The penny introduced by Offa was about 20 grains (1.296 g). Edward the Elder increased the weight of the English penny to 26 grains (1.685 g), thereby aligning it with the penny of Charlemagne. By the time of the Norman Conquest (1066), it had decreased to 24 grains (1.555 g). This value was subsequently called the "pennyweight" and formed the basis of
Five Grains Five Grains The Five Grains or Cereals (Chinese: , , "Wǔ Gǔ") are a grouping (or set of groupings) of five farmed crops that were all important in ancient China. Sometimes the crops themselves were regarded as sacred; other times, their cultivation was regarded as a sacred boon from a mythological or supernatural source. More generally, "wǔgǔ" can be employed in Chinese as a synecdoche referring to "all" grains or staple crops of which the end produce is of a granular nature. The identity of the five grains has varied over time, with different authors identifying different grains or even