Includes: Airy, G.B. Gravitation: An Elementary Explanation of the Principal Perturbations in the Solar System. Half calf and marbled boards. Ex-library. London: Charles Knight, 1834. * [Anon.]. Nebulae and Comets. (12mo) original green cloth. London: T. Nelson, [1884]. * Hubble, Edwin. The Observational Approach to Cosmology. Blue cloth. Oxford: Clarendon Press, 1937. * Hubble, Edwin. The Realm of the Nebulae. Blue cloth. New Haven: Yale University Press, 1936. * Macpherson, Hector. The Romance of Modern Astronomy. Period full calf. London: Seeley, 1911. * Stawell, Robert. The Story of the Heavens. Bound as 2 volumes. Blue half calf and marbled boards. London: Cassell, 1893. Together 6 works in 7 volumes.