One noteworthy point in connection with the scientific supernaturalism is that these themes appear only in novels and short stories. They do not cross over into poetry as do most of the other forms of the ghostly art. Perhaps this is because the situations are intellectual rather than emotional, brain-problems or studies in mechanisms rather than in feelings or emotions. The province of science is removed from that of poetry because the methods and purposes are altogether different. The scientific methods are clear-cut, coldly intellectual. Science demands an exactness, a meticulous accuracy hostile to poetry which requires suggestion, vagueness, veiled mystery for its greatest effect. _The Flower of Silence_, for instance, would be a fitting title for a poem, but the poetic effect would be destroyed by the need for stating the genus and species of the orchid and analyzing its destruction of human tissue. Nature's mysterious forces and elements in general and vaguely considered, veiled in mists of imagination and with a sense of vastness and beauty, are extremely poetic. But the notebook and laboratory methods of pure science are antagonistic to poetry, though they fit admirably into the requirements of fiction, whose purpose is to give an impression of actuality. Another reason why these scientific themes do not pass over into poetry may be that scientific methods as we know them are new, and poetry clings to the old and established conventions and emotions. There is amazing human interest in these experiments, a veritable wealth of romance, with dramatic possibilities tragic and comic, yet they are more suited to prose fiction than to poetry. We have adapted our brain-cells to their concepts in prose, yet we have not thus molded our poetic ideas. It gives us a shock to have new concepts introduced into poetry. An instance of this clash of realism with sentiment is shown in a recent poem where the setting is a physics laboratory. Yet in a few more decades we may find the poets eagerly converting the raw materials of science into the essence of poetry itself, and by a mystic alchemy more wonderful than any yet known, transmuting intellectual problems of science into magic verse. _Creation_, by Alfred Noyes, is an impressive discussion of evolution as related to God.