A copy of Porter's script for 'The Night Sky in July' on the Milky Way, including its stars counted by William Herschel, its shape, and its centre situated in the direction of Sagittarius; the path of the Milky Way flowing through Aquila, Cygnus and Cassiopeia, and the number of stars in our galaxy; the resolution of stars in other galaxies established using red-sensitive photographic plates taken with the 100" Mount Wilson telescope; proof that our galaxy is a spiral, confirmed by Dutch radio-astronomers; the position of the visible arms in the sky; and contemporary ideas on distances in the universe being too low.