their descendants as an improved physical organization, and in those descendants it finally reached the marvelous development of the most perfect languages of antiquity. Let us now retrace our steps back to the time when nervous organization, in the successive generations of the whole animal series regarded as one great family of kindred animals successively developed out of a common stock, began to act in such a way as to evince the presence of what we call mind. Once attained, this improved nervous organization would be transmitted by the parents to new individuals; and so on through countless generations, just as the offspring would inherit the same physical structure as the parents in other respects. Mental phenomena are the products of nervous organization. We have no means of knowing that mind is an organism or an entity. If it is an existence capable of surviving the death of the body, which evolution neither affirms nor denies, you must go to revelation for the grounds of belief in its immortality. There is no conflict between the evolution theory of the nature of mind and the doctrine of immortality as taught by revealed religion. SOPHEREUS. I am not disposed to constitute myself a champion of revealed religion. I have lately read in the writings of some well-meaning persons, whose positions and convictions made them anxious about the truths of revelation, expressions of the opinion that there is no necessary conflict between the hypothesis of a revelation and the teachings of evolution. I have been rather surprised by such concessions. But through all our discussions, and throughout all my reflections and inquiries, I have excluded revealed religion from the number of proofs of our immortality. But it seems to me that, as to the possibility of a survival of the mind after the death of the body, you have stated yourself out of court, not because you have propounded something that is inconsistent with revelation, although it certainly is, but because you have made mind to consist in nothing but the action of nervous organization, and when that has perished what can remain? You may say that science does not undertake to determine that mind is or is not a special existence capable of surviving the body. But, observe that you attribute to nervous action the production of phenomena to which you give the name of mind, when the nervous action evinces some power of volitional variation and control. Now, when and where did this begin, in the long series of animal organisms which you assume have been successively evolved out of one another? Remember that, according to the system of evolution, there are supposed to have been countless forms of animal organisms, graduating by slow improvements into higher and higher organisms. Where and when and what was the first animal that possessed a nervous organization which would manifest the power of variation in so marked a degree as to render