Mr. Spencer has described a general indefinite process as "the redistribution of matter and motion," but he has revealed no natural law, or fundamental explanation of natural phenomena. Every important question leads him to a stone wall which he does not try to scale or penetrate, but labels the "Unknowable." A learned philosopher who has spent his life endeavoring to instruct others should not fall back into the convenient ditch of the "unknowable." He says: "What is it that holds together the parts of which this ultimate atom may be imagined to consist? The only answer is a cohesive force." But he does not attempt to explain what that cohesive force is, while I undertake to say it is magnetic cohesion under the law of electro-magnetism, which holds aggregations of atoms in organic affinity, producing visible form and substance. He says: "Force is the ultimate of ultimates. Matter and motion are only different manifestations of this unknowable force." This is making force usurp the place of Deity. Force is a servant, not a master--a tool and not an ultimate cause. Force without intelligence back of it is anarchy and ruin; it is chaos and not a cosmos. God is a scientific necessity. The ultimate of ultimates is mind or spirit--the eternal intelligent spirit of Deity and man. I accept the scientific postulate that the conservation of energy and the correlation of forces affirm, first, that there is but one kind of energy or force in the physical universe; but I go further and contend electric energy is that force. Second, that, like matter energy cannot be created or destroyed. Third, that energy appears in a variety of forms as motion, heat, light and so-called gravity and chemical action. Fourth, that these forms of energy are interchangeable--any one form may change into any other form, and all are transformations of the one ultimate force I term electricity. Fifth, that there is nothing in science to show that mind or spirit ever changes into physical energy, or force into mind or matter, or either into the other. This destroys the doctrine of monoecism, or all things from one substance. And Haeckel will have to produce more facts and logic than he has yet set forth to prove that spirit and matter, force and matter are all one and the same thing or substance. The psychic or mental force is the paramount force, and the true realm of evolution belongs to the mental or spiritual universe and to organic nature. Physical changes are not evolution in the highest sense except as they are the result of spiritual power and unfolding intellect. The highest sphere of evolution is in biology and psychology.