Eller, John Theodore, De Brockhusen

, a physician of Prussia, was born at Pletzaw, in the principality of Anhalt-Bernburgh, in 1689. He received the first rudiments of education at home under a private tutor, and was then sent to the university of Quedlinburgh, and thence to Jena, in 1709. His father intended him for the law; but a passion which he expressed for mathematical and physical researches, soon altered that design, and determined young Eller to follow the profession of physic. | As Jena afforded no opportunity for the study of anatomy, he was removed to Halle, and soon after to Ley den, to finish his education under the celebrated Albinus, and the learned Sengerd and Boerhaave. Thence he passed to Amsterdam for the advantage of hearing the lectures of Rau, and examining the preparations of iluysch, and he followed Rau to Leyden, on the latter being appointed to succeed professor Bidloe. Having quitted Leyden, he spent some time in the mines of Saxony and Hartz, where he completed his chemical studies, and made astonishing progress in metallurgy and other parts of natural knowledge. On his visiting Paris, he attended several new courses in chemistry, under Lemery and Homberg, while he was pursuing his anatomical studies under the direction of Pecquet, du Verney, Winslow, and acquiring physiological and practical knowledge by the assistance of Astruc, Helvetius, Jussieu, &c. Though every branch of medical knowledge, and particularly surgery, was successfully practised in Paris, the reputation of Cheselden’s operation for the stone, and the ambition of being known to the immortal Newton, drew Mr. Eller to England, where he arrived in company with the earl of Peterborough, and remained five months. Leaving London in 1721, he returned to his own country, and was immediately honoured with the place of first physician to his sovereign the prince of Anhalt-Bernburgh; but he afterwards removed to Magdeburgh, where he soon attracted the notice of the king of Prussia, Frederick I. by whom he was made physician in ordinary, counsellor of the court, professor of the royal college of physic and surgery at Berlin, physician to the army, and perpetual dean of the superior college of medicine; employments equally honourable and lucrative. On the accession of Frederick II. he was farther promoted, and in 1755 was created a privy counsellor, the greatest honour to which he could possibly arrive, in his career as a scholar; and the same year he was appointed director of the academy called “Curieux de la nature,” where, according to the custom of the society, he was introduced by the name of Euphorbio. These employments and dignities he retained to his death in 1759. After his death was published a work by him, entitled “Observationes de cognoscendis et curandis morbis, praescrtim acutis, 1762, 8vo, which was translated into French by Le Roy, 1774, 12mo. This work is chiefly founded on | the results of his long practice. He wrote also various papers in the Transactions of the Academy of Berlin, for the years 1748, 1749, and 1752, which with other pieces by him were collected and published, in German, under the title of” Physical, chemical, and medical treatises," Berlin, 1764, 2 vols. 8vo. ¹