(Theophilus), was born at Geneva in the year 1620. His parents were able to give him the most liberal education, and his genius directed him to the study of physic; and that he might have every advantage, he attended on the lectures of the most eminent professors in many of the celebrated universities in Europe. In 1643 he was admitted to the degree of M.D., and was for some time physician to the Duke of Longueville. His superior skill in his profession soon brought him into considerable repute; but being seized with an excessive deafness, he was obliged to retire from business when about 60 years of age.

During this retirement he employed himself in collecting all the observations which he had made in a practice of forty years duration, and in arranging them under proper heads. His first publication, which was intitled Phares Medicorum, &c. consists of practical cautions, extracted mostly from the works of Bellonius; and in it he points out many errors which then prevailed in the general practice of physic. Of this work he gave to the world a second edition, considerably improved and greatly enlarged; and in 1687 it was a third time printed at Geneva, under the title of Labrinihi medicis extricati, &c.

In 1675 he published Prodromus anatomiae practicae, sine de additis morborum causis, &c. This was intended merely as an introduction to a work that soon followed, under the title of Sepulchreum, sine anatomia practica ex cadaveribus morbo denatis. In these two publications he has collected a great number of curious observations upon the diseases of the head, breast, belly, and other parts of the body.

In 1682 appeared at Geneva Mercurius Comptalarius, sine index medico-practicus per decisiones, cautiones, &c. in folio; and in 1684 and 1686 two volumes in folio likewise, intitled Medicini Septentrionalis collatio. This last work is a collection of the best and most remarkable observations in physic which had been then made in England, Germany, and Denmark, which Dr Bonet and Bonnet ranged under proper heads, according to the several parts of the human body. At Geneva, in 1692, was published, in three volumes folio, Polyalther, sine Theatrum medici practicus ex quolibet rei medica scriptoribus congeturis, &c. and some years before, he gave to the world correct editions of Theodori Turqueti de Maure tractatus de arthritide, una cum ejusdam aliquot confituis; and of Jacobi Robustii tractatus physicus e Gallico in Latinum versus. This laborious and useful author died of a dropy on the 20th of March 1698.