The globe itself rotates within a metallic meridian to which its axis is attached.
Hence when a current is passed through the meter, the armature rotates and increases its speed until the driving force is balanced against the retarding force due to the eddy currents in the copper brake disk.
Neglecting the mass of the shaft itself, when the shaft rotates with an angular velocity a, the centrifugal force Wae/g will act upon the shaft and cause its axis to deflect from the axis of rotation a distance, y say.
The movement of the zoospore is effected by the lashing of the cilia and is in the direction of the beak, while the zoospore slowly rotates on its long axis at the same time.
When one piece rotates, and the other shifts, the axis of the rotMing piece, and all the points of contact, lie in a plane perpendicular to the direction of motion of the shifting piece.