1681-1755, active 1707-1730, mathematical instrument maker & map surveyor, English; British Richard Glynne 1681 - 1755
1682-1744, natural philosopher; optical instrument maker; mathematician, British; English John Hadley 1682 - 1744
1688-1763, mathematical instrument maker; science lecturer, British; English Francis Hauksbee 1604 - 1763