Natural harmonics
Stage 3's harmonics-on-the-page taught you to recognise a harmonic — the circle, the
diamond notehead — and promised the producing would come here. This is that lesson.
Touch, don't press
Rest a finger lightly on the string at one of its nodes — flatter than a normal stopping finger, with no downward weight at all — while the bow, ideally already moving before contact, stays close and parallel to the bridge. Press even slightly and the harmonic dies into a dull, muted thud. The whole technique is "less is more."
Three you can reach without shifting far
Every string has this same set of three — the fractions (½, ⅓, ¼ of the string) are the same regardless of which open string you're touching.
Try it
Try
Find the octave harmonic on the D string first — it's the easiest to locate, since the midpoint is a large, forgiving target. Once that speaks cleanly, hunt for the octave-plus-fifth a third of the way up, then the two-octave harmonic a quarter of the way up. If a harmonic won't speak, bow a little faster and a little closer to the bridge before assuming your finger placement is wrong.
The usual mistake
Pressing instead of touching — the single most common failure, and the reason a harmonic attempt turns into an ordinary stopped note or a dead thud. The lighter your finger, the purer the ring; there's no such thing as "a little bit pressed."