Different types of equatorial clock-driven telescopes were built or proposed in the 17th and 18th century including English astronomer Robert Hooke's 1674 paper proposing their use in precision measurement,Allan Chapman, England's Leonardo: Robert Hooke and the Seventeenth-Century, page 169 a clock-driven aerial telescope objective lens constructed in 1685 by Italian-French astronomer Giovanni Domenico Cassini fitted with setting circles,Henry C. King, The History of the Telescope, page 61 and one supposedly built by English clockmaker and inventor George Graham early 18th century.Henry Lonsdale, George Routledge & sons, The Worthies of Cumberland, 1875, page 36
