bridge, in favor of a dogma which cannot point to one scientific fact in its support,--a party demanding absolute perfection of proof as the condition of its acceptance of one theory, while it at the same time fiercely defends a conception of nature of which it cannot furnish the most imperfect proof. It is true that mankind has not beheld the evolution of the whole vegetable and animal kingdom. But neither had any human eye ever yet beheld the planet Neptune when Le Verrier prophesied its existence and calculated its size and position. The theory of Evolution is a reasoning from the constancy of nature, as was that of Le Verrier, only, in the case of the former, we have the observation and calculations of not one scientist alone, but of thousands, on which to rely. To demand of the scientist that he shall produce the organic from the inorganic, and practically demonstrate the change of form and function, and the process of separation of species, before the possibility of such development is conceded, is on a par with demanding of him an actual reproduction of the Glacial Period before the theory of its previous existence shall be accepted. There is no reason for supposing that, if spontaneous generation once took place, the peculiar complication of conditions which produced it will ever again recur or can be artificially constructed. But science has no desire to be dogmatic. It readily acknowledges the total absence of direct and established proof at this particular juncture of the beginning of life. It can only point to the indirect testimony of Physiological Chemistry and Crystallogeny, to the simplicity of structure and movement in certain forms of life, and finally to the observed constancy of nature. But an exaggerated significance has been given to this chief flaw in the theory of Evolution, by those who, starting with the intention of defending Theology or the dignity of the Human, have been driven back, step by step, to this point, and fail to perceive that, arrived here, they have already abandoned the ground on which contest was possible. What significance a primal creation merely of lowest organisms can have, for either a defence of human dignity or for Christian Theology, it is difficult to perceive. As a matter of choice, it would seem to be more consistent with the omnipotence and dignity of a Creator to suppose that these very simple organisms arose, like other forms, under the action of natural law than that special interference was necessary in just their case. But, supposing such a special Creation, the following questions immediately present themselves from the theological standpoint: Are these special creations endowed with soul? If so, they must be immortal; if not, then soul arises in the process of evolution; if it arises as do all other things, qualities, functions, by growth,--that is, by the addition of infinitesimal increments (as we must, indeed, suppose it to