At last he gave up, hot and perspiring from the mental exertion.

It was chore that pleased him, requiring little physical or mental exertion.

She studied much, reading English and foreign books which required mental exertion.

Again silence, while the rotund Mucklewame perspires in the throes of mental exertion.

Early morning was the only time for physical as we; as mental exertion.

Any kind of mental exertion may help to retard your recovery.

Of purely mental exertion, no; but of heart emotion, many female patients, perhaps?

He hoped she was committing no imprudence in the way of excessive mental exertion.

These duties involved prodigious physical and mental exertion, in a climate deadly to Europeans.

Prostrated by mental exertion, Mrs. Wragge was pursuing the course of the omelette in dreams.

No female patient, in the range of my practice, ever died of purely mental exertion.

He had no power of using active mental exertion to keep himself from doing evil.

Always languid, toward night he generally felt especially disinclined to any bodily or mental exertion.

There should be mental exertion in every exercise.

Then a little physical or mental exertion beyond the ordinary often means a breakage or extinction.

Any physical or mental exertion increases the plain.