A horrified old woman observing the monstrous contents of a drop of water through a microscope. Coloured transparency lithograph.

The transparency reveals the microscope's image: the water contains a grisly assortment of creepy crawlies. Each side of the lettering is a vignette: (left) a man with a water pump, (right) two men with a telescope. Perhaps based on Holland's microscope, which was displayed at 106 New Bond Street, London, in 1835, showing creatures in a drop of water (Paul Pry, in The theatrical observer, 3 January 1835)