The permeability of matter was a fact that had been under scrutiny for a long time before the discovery of the Röntgen rays. Sir David Brewster notes the passage of carbon through solid wood by means of electric fluid, and by an electric current an acid may be separated from its sodium base and passed through dilute syrup of violets without changing the colour of the vegetable solution. The question then arises, in what form was the carbon in the one case and the acid in the other when they passed through the respective media? Obviously their atomic vibrations were temporarily raised in such degree by electrical action as to change them from their normal characters. I suggest to psychologists that something of the same or a similar nature may occur in the case of individuals when acting under the influence of hypnotism or spiritual afflatus, ecstasy, etc. The question is whether they can be rendered permanent effects. But these are not by any means the whole of the problems confronting modern Science, which nevertheless has a tendency to become dogmatic in other matters with which it is not officially concerned, as one may learn from a reading of Häckel’s _Riddle of the Universe_. In Ernst Häckel we see probably the last of the old school of materialistic philosophers. Another problem is that of atomic arrangement. It has been observed that two chemical bodies composed of exactly the same number of atoms of the same elements assume entirely different characteristics by reason of their respective atomic arrangement. This fact, while wholly unexplained, opens up many interesting psychological issues and serves by analogy to explain why two human beings compounded of exactly similar cosmic elements, manifest different characters and faculties. Science has too long neglected the free use of its own hypothesis of the solidarity of the system, and while astronomy employs interplanetary action in all its calculations, it scouts the idea of astro-meteorology and relegates astrology to the limbo of antiquated superstitions. Yet both these concepts are necessary and logical dependents of the cosmical hypothesis.