Seems with me to steady the nerves and clear the brain.

And clear the brain of misty fogs

How does a short walk " clear the brain" and enable one to study to better advantage?

It quickens the reasoning capacity, helps to clear the brain of "cobwebs" and unquestionably adds to one's courage.

It invigorates the muscles, strengthens the nerves, and clears the brain.

The earnestness and intensity of Gudovitch temporarily cleared the brain of the drunken Czar.

This is what clears the brain for business next day.

Nothing like manual labour for clearing the brain.

There are times when it clears the brain for the moment and reveals things as they are.

The out-of-doors clears the brain, and there a man learns to think straight and to the point.

Then he settled back and laughed with a fervor that cleared the brain of a thousand vague misgivings.

'Tis a fine breezy place to clear the brain, and a briny air to sharpen the judgment.

I think the pressure of a good deal of mechanical work, not of an exhausting kind, clears the brain and makes it vigorous.

"Ha-bitually," says Lord William, and begins discoursing on the coffee-bean, and how it cleared the brain.