By Paul Carus
An investigation of the facts of physiological and experimental psychology. Illustrated. Cloth, $1.50 net; paper, 85c.
Plant Breeding
By Hugo De Vries
Comments on the experiments of Nilsson and Burbank. Illustrated. Cloth, gilt, $1.50 net
The Rise of Man
By Paul Carus
A sketch of the human race. Illustrated. Boards, cloth back, 75c net
Species and Varieties, Their Origin and Mutation
By Hugo De Vries