Current Hypotheses explaining the Origin of Rotation.

Rotation has originated:

(a) By the collision of nebular masses wandering aimlessly in Space; or by attraction, “in cases where no actual impact takes place.”

(b) By the tangential action of currents of nebulous matter (in the case of an amorphous nebula) descending from higher to lower levels,833 or simply by the action of the central gravity of the mass.834

“It is a fundamental principle in physics that no rotation could be generated in such a mass by the action of its own parts. As well attempt to change the course of a steamer by pulling at the deck railing,” remarks on this Prof. Winchell in World-Life.835