NODE (Latin nodus, a knot). The vibration of a string may assume many different forms. In Fig. 1 the string is shewn vibrating as a whole; in Fig. 2 it divides into two equal segments; in Fig. 3 into three equal segments. These segments, where the amplitude of vibration is greatest, are called Loops (l, Figs. 2 and 3), and the points of rest between them are called Nodes (n).
But when a string is plucked, as in the harp and...