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
Precious McKenzie Precious McKenzie Precious McKenzie MBE (born 6 June 1936) is a South African-born former weightlifter who won Commonwealth titles representing both England and New Zealand and has won several World powerlifting and Masters World powerlifting titles. He is of diminutive stature at 1.45m (4' 9"). Born in Durban, South Africa, Precious McKenzie suffered from ill-health during his childhood. An ambition to be a circus performer ended because of South Africa's race laws and this led him to weight training and weightlifting. Although he was ranked the best weightlifter in his weight category in South Africa, he was barred from representing