Nocturnals Nocturnal, English, late 17th-early 18th century

Nocturnals Nocturnal, English, late 17th-early 18th century. Nocturnals were used for telling the time at night from the stars. By the late 17th century, wealthy gentlemen often commissioned highly decorative forms of basic mathematical instruments, using expensive materials, indicating that these objects were designed to impress as well as to educate. Unlike the simplest versions, which could be used only with the 'guide stars' of the Great Bear, more elaborate nocturnals, such as this gilt brass example, could also be used with the Little Bear. ©SSPL/Science Museum