The two graphs shown offer visual guidelines for orientation and quick approximation of the quantity of solution in circular and rectangular containers. The graph "Circular Tank" shows, for round containers, the given diameter in feet at the lower scale. For convenience, the corresponding approximate metric diameter (cm) is shown opposite at the upper scale. Following the direction of the heavy arrows, shown for the Example, D = 4 ft (118 cm), one reads, at the height of the intersection of the corresponding vertical and the diagonal line, the solution volume per unit height (v/h) at the left ordinate, for example 95 gal/ft, corresponding to about 11.2 liters per centimeter shown at the right ordinate.
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机译：所显示的两个图形为圆形和矩形容器中溶液的定向和快速近似提供了视觉指导。对于圆形容器，“圆形罐”图以较低的刻度显示给定的直径（以英尺为单位）。为方便起见，相应的近似公制直径（cm）在上方以相对比例显示。按照示例中所示的粗箭头的方向，D = 4英尺（118厘米），人们在相应的垂直线和对角线的交点高度读取每单位高度的溶液体积（v / h ）在左纵坐标处，例如95 gal / ft，相当于在右纵坐标处显示的每厘米约11.2升。
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