Charles Darwin, The Descent of Man, and Selection in Relation to Sex, 2nd edition, London: John Murray, 1890. Green cloth cover.
Darwin's book applying his theory of evolution by natural selection to man. The two volumes are bound as one in this publication.
Dimensions are 5 3/16 x 7 5/8 x 1 1/2 inches, 23 1/4 oz.