Agricultural bacteriology: a study of the relation of bacteria to agriculture, with special reference to the bacteria in the soil, in water, in the . products, and in plants and domestic animals
Social heredity and social evolution; the other side of eugenics
The living world: whence it came and whither it is drifting; a review of the speculations concerning the origin and significance of life and of the . to the direction in which the development is
The method of evolution; a review of the present attitude of science toward the question of the laws and forces which have brought about the origin of species