Lewis Bertrand, a learned Jesuit, was born at Montpellier in 1688, and entered among the Jesuits in 1703. He studied polite literature in his youth, and at length applied himself entirely to the study of mathematics and natural philosophy. He distinguished himself by writing on gravity, mathematics, and the music of colours, a very whimsical idea, which he took great pains to reduce to practice. His piece on gravity, entitled Traité de la Pénétrante Universelle, was printed at Paris in 1724. He afterwards published his Mathématique Universelle, which occasioned his being unanimously chosen a fellow of the Royal Society of London, without the least solicitation. He was also member of the academies of Bordeaux and Rouen; but his Clavecin Oculaire made the greatest noise; and he spent much time and expense in constructing a harpsichord for the eye, but without success. He also wrote for and against Sir Isaac Newton; and published several other works, the principal of which are Le Plan du Mathématique abrégée, and a treatise entitled Optique des Couleurs. He led a very exemplary life, and died in 1757.

Castelo Branco, or Castello Branco, a strong city of Portugal, in the province of Beyra, on the upper branch of one of the streams that form the Tagus. This place is the seat of a bishop, and contains 1114 houses, and about 4000 inhabitants.