Reference Tables THE METRIC SYSTEM, WITH EQUIVALENTS. The entire metric system of weights and measures is based upon a fundamental unit called a meter, which is the ten-millionth part of the distance from the equator to the pole, and is the principal unit of linear measure. The ARE, or unit of square measure, is a square whose side is 10 meters. The STERE, or unit of cubic measure, is a cube whose edge is a meter. The LITER, or unit of all measures of capacity, is a cube whose edge is the tenth of a meter. The GRAM or unit of weight, is the weight of a cube of pure water at its greatest density, the edge of which is the hundredth part of a meter. |