Projection of the stars in the Milky Way galaxy

Plate 18 figure 16 for the paper 'Account of some observations tending to investigate the construction of the heavens', by William Herschel, Philosophical Transactions of the Royal Society, vol.74 part 2 (1784), pp.437-451. A demonstration that an observer within the Milky Way galaxy 'will see all the stars in the direction of the planes of the stratum projected into a great circle, which will appear lucid on account of the accumulation of the stars...' and explaining the scattering of stars forming the constellations.