Pierre Louis Morean De Maupertuis, a French astronomer, born in St. Malo, July 17, 1698, died in Basel, July 27, 1759. He was five years in the army, but he resigned in 1723, and was admitted into the academy of sciences. His ability in opposing the physical theory of Descartes, and substituting for it that of Newton, gained him admission in 1727 into the royal society of London. The controversy had excited public interest, when the French government resolved to verify one of the hypotheses of the British philosopher, that of the flattening of the terrestrial globe near the poles. Mau-pertuis was at the head of a commission of academicians, including Olairaut and Lemon-nier, which in 1736-7 measured an arc of a meridian in Lapland; and the result, confirming the conjecture of Newton, gave him distinction throughout Europe. He was invited by Frederick the Great to Berlin, where he became president of the academy, married a lady of a distinguished family, and received large pensions. In 1750 he became involved in a controversy with Konig, who disputed one of the principles of Maupertuis and maintained that it was a plagiarism from Leibnitz. The latter years of his life were afflicted by illness.