In the same manner we may predicate another ether, the medium through which all spiritual phenomena are produced. We may prove the existence of this ether, by the certainty and harmony of the answers it gives, as the existence of the luminiferous ether has been demonstrated. As the great life-giver, we may distinguish it as psycho-ether. It can not be said to be material, for it belongs to the region beyond that recognized as material by our senses. It is the sublimation of matter, vastly more attenuated than light-ether, and thought is propagated in it from thinking centers, as light is in the luminiferous ether from luminous bodies. The qualities of this ether are the possibilities of life and spirit and to it for explanation we refer all psychic phenomena. What the Senses Teach of the World and the Doctrine of Evolution. IS THERE MORE THAN ONE WORLD--STUFF?--Thus far, with a few exceptions which may be called heterodox, physicists have in their speculations used the term matter as though in ultimate conception there is but one kind of matter and the atoms of that matter are absolutely alike. In other words there is but one stuff of which the cosmos is formed. The senses on which this theory is based do not endorse, but, by their limitation, prove the opposite. We have no means of knowing of sound aside from the ear, which is wonderfully fashioned to receive vibrations and transmit them to the brain; yet its imperfection, caused by the limitations of nerve tissue, reveals the fact that it is cognizant of only a narrow field, either side of which is a wide tract, which to it is profound silence. If a sound wave impinges on the ear with less vibrations than 16½ times in a second it is inaudible; and if the number of vibrations is increased above 38,000 per second, they again lose the power of impressing the ear. There may be insects capable of hearing these high sounds, which to man are silence itself; and the long waves that beat less than 16½ times in a second may be sweet music to some of the lower tribes of animated life. Perfect as the eye may be as an optical instrument, its range is far less than that of the ear. Only those rays of light having waves 1-39,000th of an inch in length are visible on one side, and the last visible radiations on the other end of the spectrum have wave lengths of 1-575,000th of an inch. This is a narrow limit, and on either side there must be rays, which eyes or nerves differently constructed would receive and interpret, yielding, perhaps, colors unknown to our consciousness. There is a harmony in color waves, like music in sound waves, for as a note blends in one, in all octaves above or below, so light waves, twice or thrice the length of given waves yield the same color impression.