Ferrel's law

The winds in consequence tend to blow towards the centre, but being diverted according to Ferrel’s law they rotate spirally inwards at the surface of the earth in a direction contrary to the movement of the hands of a watch in the northern hemisphere, and the reverse in the southern hemisphere.

FERREL’S LAW, in physical geography.

In accordance with Ferrel's law, they are deflected to the right, and the result, as will readily be seen, must be a vortex current, which whirls always in one direction—namely, from left to right, or in the direction opposite to that of the hands of a watch held with its face upward.