Trade card for George Adams, instrument maker to King George III, c 18th century.
© Science Museum / Science & Society Picture Library
George Adams (1704-1773) of Fleet Street, London was instrument maker to George III (1738-1820); several of the astronomical, mathematical and electrical instruments he made survive in the collection of the Science Museum. Advertised are quadrants, sundials, drawing instruments, a new portable microscope, globes, orreries, models to demonstrate the positions of the planets, and a 'cosmotheoron', 'by which all the celestial phenomena are plainly and clearly exhibited'. Other items include weaponry, air pumps, hydrostatical balances, compases, barometers, and a camera obscura, 'for drawing in perspective'. The portrait is of Danish astronomer Tycho Brahe (1546-1601).