Coins of the pound sterling another silver coin, the sceat, of 20 troy grains weight, which was in general circulation in Europe during the Middle Ages. The weight of the English penny was fixed at troy grains (about 1.46 grams) by Offa of Mercia, an 8th-century contemporary of Charlemagne. The coin's designated value, however, was that of 24 troy grains of silver (one pennyweight, or of a troy pound, or about 1.56 grams), with the difference being a premium attached by virtue of the minting into coins. Thus, 240 pennyweights made one troy pound of silver in weight, and the monetary value of 240 pennies
Five Grains behavior towards the Five Grains could take on political meaning: as a protest against the overthrow of the Shang Dynasty by the Zhou, Boyi and Shuqi ostentatiously refused to eat the Five Grains. Such rejections of the grains for political reasons underwent a complex development into the concept of "bigu", the esoteric Taoist practice of achieving immortality by avoiding certain foods. By the time of written records, the development of agriculture in China had become greatly mythologized. There were various traditions regarding which of the early Chinese leaders introduced the Five Grains: Shennong (神农) ( "Divine Farmer") was a Chinese