Lucernal microscope, 1787.
© Science Museum / Science & Society Picture Library
Lucernal microscope (Fig 1), mounted and ready for use. It could be used for observing 'opake' (opaque) and transparent objects, with or without the lamp. Illustration from 'Essays on the microscope' by George Adams (1750-1795), published in London in 1787. Adams was instrument maker to King George III.