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
Standard weight in fish preferable that standard weight equations represent the entire geographical range of a species, and that they be used for comparison purposes rather than management targets. Practically, weight-length equations are often developed for sub-populations from specific geographic areas, but these are different from standard weight relationships. Length measurements reported for fish may be of the fish’s total length, fork length, or maximum standard length. For standard weight equations, the total length is used. In some species, male and female fish have different standard weight curves. For example, Anderson and Neumann report different standard weight equations for male and female paddlefish. Some