That the variability of an organism to a certain extent is a constant and certain condition of life we admit, otherwise there would be no distinguish….

No naturalist has devoted more painstaking attention to the structure of the barnacles than Mr. Darwin..

But, as we have before been led to remark, most of Mr. Darwin's statements elude, by their vagueness and incompleteness, the test of Natural History ….

Every step in the progress of this study has tended to obliterate the technical barriers by which logicians have sought to separate the inquiries rel….

The relationship between a Russian and a bottle of vodka is almost mystical..

Cuvier had preceded Lamarck in specifying the kinds and degrees of variation, which his own observations and critical judgment of the reports of othe….

Mr. Darwin refers to the multitude of the individual of every species, which, from one cause or another, perish either before, or soon after attainin….

The laws of Coexistence;-the adaptation of structure to function; and to a certain extent the elucidation of natural affinities may be legitimately f….

Homologue. The same organ in different animals under every variety of form and function..

The powers, aspirations, and mission of man are such as to raise the study of his origin and nature, inevitably and by the very necessity of the case….

Mr. Darwin contributes some striking and ingenious instances of the way in which the principle partially affects the chain, or rather network of life….

Analogue. A part or organ in one animal which has the same function as another part or organ in a different animal..

Manifold subsequent experience has led to a truer appreciation and a more moderate estimate of the importance of the dependence of one living being u….

The combination of such characters, some, as the sacral ones, altogether peculiar among Reptiles, others borrowed, as it were, from groups now distin….

The steam-engine in its manifold applications, the crime-decreasing gas-lamp, the lightning conductor, the electric telegraph, the law of storms and ….

Rapid innovation is the cure for the ills we face, but because innovation is difficult and susceptible to failure, we might need to rethink the way w….