Trade card of Dudley Adams, instrument maker, 18th century.
© Science Museum / Science & Society Picture Library
Dudley Adams was the son of the famous instrument maker George Adams (1704-1773) and brother of George Adams the Younger (1750-1795). He took over the family busines in Fleet Street and in turn became optical and mathematical instrument maker to George III (1738-1820) as well as his post as optician to the Prince of Wales. The advertisement depicts compases, quadrants, orreries or planetariums, telescopes, globes, thermometers and sun dials. The portrait is of the Danish astronomer Tycho Brahe (1546-1601), widely held to be the greatest pre-telescope observer.