THE title of this book suggests a variety of problems. Some of them are of interest to scientists, some to theologians, some to philosophers. It is my aim here to isolate those that are of interest only to scientists and that can be tackled only by the application of scientific method. They are among the most fundamental that scientists can ever have to consider; for they are concerned with the nature of reality. I shall t claim to have a solution for any of these problems. Only a charlatan would do that. In science one must expect a long and weary trail between the first attempt to formulate a problem and the final achievement of solving it. If I succeed in following the trail for only a very short distance I shall have accomplished what I set out to do. This distance will t be great eugh to lead to anything deserving the name of a theory. It will only lead to a hint at the direction along which further progress may be looked for. Reginald Otto Kapp was a mechanical engineer who was appointed the first professor of electrical engineering in Birmingham University, lecturer, author and founder of The Presentation of Technical Information (PTI).