This page shows the resultant pitches from all natural harmonics (up to the fourth harmonic) for orchestral strings. Note that for the third and fourth harmonic, there are two options for where to touch the string — the higher position, which is indicated using a harmonic circle, and the lower position, indicated using a touch-notation (diamond notehead).
Sounding a octave above the open strings
Sounding an octave and a fifth above the open strings
Sounding two octaves above the open strings