CONTENTSCHAPTERPAGEI.[The meaning of Four-Dimensional Space][1]II.[The scope of application and probable importance of the higher space concepts][21]III.[Application to certain of the facts elicited by Psychic Research][39]IV.[Some other possible applications of the hypothesis][92]V.[Vitality and Will][113]VI.[Higher Space and Physical Science][122]VII.[The Connecting Link][136]VIII.[The Religious Aspects of the hypothesis][168]IX.[Summary and Conclusion][181][Appendix][187][Index][196]