The manner of Demoivre's death has a certain interest for psychologists. Shortly before it, he declared that it … - W. W. Rouse Ball

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I think there are different kinds of happiness. We know when we're happy a lot of the time, but then there are those moments that have more of an afterglow, when the happiness has more depth.

W. W. Rouse Ball

The manner of Demoivre's death has a certain interest for psychologists. Shortly before it, he declared that it was necessary for him to sleep some ten minutes or a quarter of an hour longer each day than the preceding one: the day after he had thus reached a total of something over twenty-three hours he slept up to the limit of twenty-four hours, and then died in his sleep.

Death, Hour, Preceding, Psychologists, Science, Sleep

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Newton took no exercise, indulged in no amusements, and worked incessantly, often spending eighteen or nineteen hours out of the twenty-four in writing.

Exercise, Hard Work, Indulged, Writing

Biot, who assisted Laplace in revising it [The Mécanique Céleste] for the press, says that Laplace himself was frequently unable to recover the details in the chain of reasoning, and if satisfied that the conclusions were correct, he was content to insert the constantly recurring formula, 'Il est àisé a voir' [it is easy to see].

Àisé, Details, Easy, Press, Science, Voir

De Morgan was explaining to an actuary what was the chance that a certain proportion of some group of people would at the end of a given time be alive; and quoted the actuarial formula, involving p [pi], which, in answer to a question, he explained stood for the ratio of the circumference of a circle to its diameter. His acquaintance, who had so far listened to the explanation with interest, interrupted him and exclaimed, 'My dear friend, that must be a delusion, what can a circle have to do with the number of people alive at a given time?'

Actuary, Alive, Circles, Death, Explanation, Science

'My dear friend, that must be a delusion, what can a circle have to do with the number of people alive at a given time?'

Circle, Circles, Delusion, Given, Numbers, Science

For other great mathematicians or philosophers, he [Gauss] used the epithets magnus, or clarus, or clarissimus; for Newton alone he kept the prefix summus.

Alone, Gauss, Newton, Philosopher, Philosophers, Science