Troy weight g, 12 oz t), while an avoirdupois pound is approximately 21.53% heavier at 7 000 grains (≈ 453.59 g). One troy ounce (oz t) is equal to grams. Also equal to avoirdupois ounces, exactly , or about 10% larger. The pennyweight symbol is "dwt". There are 24 grains in 1 dwt, and 20 dwt in one troy ounce. Because there were 12 troy ounces in the old troy pound, there would have been 240 pennyweights to the pound—the basis of the fact that the old British pound sterling of currency contained 240 pence. (However, prior to 1526, English pound sterling
Five Grains categories of grains. The name is typically translated as the "Five Grains" or the "Five Portions of cereal", and less often as the "Five Sacred Grains" or "Crops". Some context is important to understanding the concept, however. First, this use of "five" predates modern botanical notions and is better understood as part of the symbolic use of numbers in Chinese culture. From a very early date, Han culture understood the world as composed of five elements and many corresponding pentads were enumerated, including the Five Directions (south, north, west, east, "and" center), the Five Colors (red, black, white, "qing", and