Doppelmaier, John Gabriel

, a German mathematician, was born at Nuremberg in 1677, and was first intended by his family for the bar, but soon relinquished the study of the law for that of mathematics, in which he was far more qualified to excel. He became professor of mathematics at Nuremberg, after having travelled into Holland and England to profit by the instructions of the most eminent scholars in that science. In England he became acquainted with Flamstead, Wallis, and Gregory, and in 1733, long after he returned home, was elected a fellow of the royal society as he was also of the societies of Petersburgh and Berlin. His works, in German, on astronomy, geography, and mathematics, are numerous. He also published some in Latin: “Nova Methodus parandi Sciaterica Solaria/' 1720.” Physica experimentis illustrata,“4to;” Atlas Ccelestis," 1742, fol. Doppelmaier made some curious experiments in electricity, at the latter part of his life, which he also published; and translated the astronomical tables of Stretius, French and English, into Latin. ²