The popular as well as the more critical acceptance of Psychical Research, both of the term and of the conceptions associated with it, has disseminated a totally false estimate on the part of the public at large of the scope and purposes of modern Psychology; and has quite possibly given an unfortunate twist to the trend of recent psychological thought. The right appreciation of scientific aims and ideals by the intelligent and influential public has come to be almost indispensable to the favorable advancement of science. Psychology can less afford than many another science to dispense with this helpful influence; and no science can remain unaffected by persistent misinterpretation of its true end and aims. If Psychical Research is to continue in its present temper, it becomes essential to have it clearly understood just how far its purposes and spirit are, and how much farther they are not, in accord with the purposes and the spirit of Psychology. The optimistic psychologist anticipates the day when he will no longer be regarded, either in high life or in low life, as a collector of ghost stories or an investigator of mediums. The disuse of the unfortunate term "Psychical Research," and far more, the modification of the conceptions animating this type of investigation, the pursuit of its more intrinsically psychological problems in a more truly psychological spirit, and perhaps, most of all, the disassociation of the term "Psychology" from the undesirable and irrelevant connotations of Psychical Research, are all consummations devoutly to be desired. THE LOGIC OF MENTAL TELEGRAPHY