Le Roy
JULIEN. A celebrated French horologist. He was the inventor of the horizontal mechanism for turret clocks. He introduced improvements in nearly all the branches of horology of his day. He died in 1759. LE ROY, PIERRE. A son of Julien Le Roy and unquestionably the greatest of all French horologists. He was born in 1717 and died in 1785. He was the inventor of the Duplex escapement.
LESSELS, M. A celebrated German clockmaker who worked for a long time with