W. W. Rouse Ball Quotes
![Newton took no exercise, indulged in no amusements, and worked incessantly, often spending eighteen or nineteen hours out of the twenty-four in writing.](http://cdn.quoteddaily.com/images/w-w-rouse-ball/newton-took-no-exercise-indulged-in-no-amusements-and-worked-incessantly-often-spending-eighteen-or-nineteen-hours-out-of-the.jpg)
W. W. Rouse Ball (2012). “A Short Account of the History of Mathematics”, p.287, Courier Corporation
W. W. Rouse Ball (2012). “A Short Account of the History of Mathematics”, p.347, Courier Corporation
"Mathematica: The Philomath's Quotation Book". Book by Robert Édouard Moritz, p. 157, 1942.
W. W. Rouse Ball (2012). “A Short Account of the History of Mathematics”, p.395, Courier Corporation
W. W. Rouse Ball (2012). “A Short Account of the History of Mathematics”, p.352, Courier Corporation