'Chart of the Heavens', c 1850.
© Science Museum / Science & Society Picture Library
Astronomical chart drawn and engraved by John Emslie, illustrating the stars visible on any night throughout the year. The chart is accompanied by instructions on how to use it, and several illustrations of observable objects of astronomical interest. The irregular white streak running roughly acros the centre of the map represents the Milky Way. Published by James Reynolds (174 Strand, London).