By a method of mechanical reasoning, I first discovered that the area of a segment of a parabola is four-thirds of the triangle with the same base and equal height.
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"Do not disturb my circles!"
"It is easier to make a thousand discoveries than to invent a single new method."
"I have found the solution to a problem that has puzzled many."
"There are things which seem incredible to most men who have not studied mathematics."
"The number of grains of sand is not infinite, but finite."
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