Harmonics

       First harmonic - the string open      Second harmonic - caused by harmonics at the 12th fret - node at the 12th fret     (divides string into 2 equal sections)      Third harmonic - caused by harmonics at the 7th fret - nodes at the 7th, and 19th fret      Fourth harmonic - caused by harmonics at the 5th fret - nodes at the 5th, 12th, and      over the neck pu (or close to it)      Fifth harmonic - caused by harmonics at the 9th fret - nodes: 4th, 9th, 16th, and      between the neck and middle pu's on a strat