Step 3 – Depress the red locking button to secure the setting. Five further clockwise rotations of the control knob to start the GREASOMATIC working.
Acted by Gansu-Qinghai rotating block at the NW Liupanshan range, the Erdos block takes anti-clockwise rotation;
A counterclockwise rotation, especially of the plane of polarized light.
" Ability of a substance to rotate the plane of polarization of a beam of light passed through it, either as crystals or in solution. Clockwise rotation as one faces the light source is "positive,"or dextrorotary; counterclockwise rotation "negative,"or levorotary."
