The document provides instructions on how to use a divider. It defines what a divider is, lists its parts, and describes its uses in measuring lengths and distances on maps. The key steps in using a divider are: 1) aligning the divider arms on the starting and ending points of the measurement; 2) lifting the dividers off without changing their alignment; and 3) placing the dividers on the new location and making marks to duplicate the measurement. The document also distinguishes between dividers and compasses, noting that dividers have two sharp points while compasses have one sharp point and one pen point positioned at the center.