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Some thirty years ago, while in college, I had paid some little attention toG eometry, haying gone with my class through three or four of the fifteen books of Euclid sE lements. But the knowledge obtained, even of the few books read, was somewhat superficial; and pursuits in after-life not requiring exercise in the science, thirty years disuse had suffered every demonstration and almost every principle derived firom Euclid to fade from the mind. A bout two years and a half ago, John A. Parker, Esq., of New York, a gentleiiian whose life had mainly been passed in mercantile and commercial pursuits, applied to me, as an old acquaintance and friend, to examine some original papers, in which he claimed to have solved the most celebrated problem in mathematics, the quadrature of the drde. He had several years before discovered what he believed to be the true ratio of the circumference of a circle to its diameter, and had, during the interval, made repeated endeavors to have his papers examined, and his positions acknowledged by mathematicians. But he had found very few to give them even a slight examination, and none to concede ther truth of his conclusions. I took up his papers and read them with great care. I was at once much impressed with the boldness, strength, and originality of his reasoiting, and finally convinced of the truth of his solution of that remarka- ble problem, which had long since been pronounced by mathematicians and learned societies as an impossibility.
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