Precision instruments by Cary, London from late 18th century

William Cary (1759-1825) was an English mathematician, surveyor, and instrument maker who lived in London in the late 18th and early 19th centuries. Cary began his career as a surveyor, working on various projects in England and Wales and he began to produce his own instruments to aid in his surveys. He was especially known for his theodolites, which are instruments used for measuring angles in the horizontal and vertical planes. In the early 1800s, Cary established his own business in London, where he manufactured and sold his own precision instruments. Cary's instruments were widely used and well-regarded during his lifetime and his business continued to operate after his death in 1825.