ABSTRACT
With savages or other men whose heads are uncovered, the eyebrows are continually lowered and contracted to serve as a shade against a too strong light; and this is effected partly by the corrugators. A half-starved man may think intently how to obtain food, but he probably will not frown unless he encounters either in thought or action some difficulty, or finds the food when obtained nauseous. Men of all races frown when they are in any way perplexed in thought, as author infer from the answers which he have received to his queries; but he frames them badly, confounding absorbed meditation with perplexed reflection. Hence it is that frowning commonly gives to the countenance, as Sir C. Bell remarks, an aspect of intellectual energy. The vacant expression of the eyes is very peculiar, and at once shows when a man is completely lost in thought.
