System of measurement The same is true of quarts, gallons, etc. Six US gallons are a little less than five imperial gallons. The Avoirdupois system served as the general system of mass and weight. In addition to this there are the Troy and the Apothecaries' systems. Troy weight was customarily used for precious metals, black powder and gemstones. The troy ounce is the only unit of the system in current use; it is used for precious metals. Although the troy ounce is larger than its Avoirdupois equivalent, the pound is smaller. The obsolete troy pound was divided into 12 ounces, rather than the
Economic reforms under Peter the Great small copper coins. The silver coins were quite large and were often cut into several parts, each part having its own turnover. As part of the monetary reform in the year 1704, a new, simple decimal system was introduced. Instead of the weight, each coin was valued by its decimal number. Eventually, Europe also started using this system, but it was much later. Minting of coins became the unconditional monopoly of the state. There were also gold coins, but they were mostly used for ceremonial purposes, as a reward to the soldiers. The ban on export of precious metals was