streicher

Hi, I came across a variant of German grip, called Streicher grip, which is supposedly done by placing thumb lightly over the stick, with its tip not touching the stick; the force to control the bow comes from index finger. I tried and it doesn't seem to be really helpful in any way of bowing...

Does anyone know what measure this: excerpt is? I know it's Mahler 3 but can't find the measure or mvt.