The purpose of this appendix is to give an expression of some new ideas which evolve directly out of the fact that humans are time-binders and which may serve as suggestions for the foundation of _scientific psychology_. The problem is of exceeding difficulty to give expression to in any form and therefore much more difficult to express in any exact or correct form, and so I beg the reader’s patience in regard to the language because some of the ideas are in themselves correct and sometimes very suggestive in spite of the language used. I am particularly interested that mathematicians, physicists and metaphysicians should read it carefully, forgive me the form, and look into the suggestions, because scientific psychology if such a science is to exist, would by necessity have to be a branch of physics. I particularly beg the mathematicians and physicists not to discard this appendix with too hasty a judgment of “Oh! metaphysics,” and also the metaphysicians not to do the same with an equally hasty judgment “Oh! mathematics.” I hope that if this appendix is sympathetically understood, mathematicians and physicists will be moved to investigate the problem. If mathematicians and physicists would be more tolerant toward metaphysics and if metaphysicians would be moved to study mathematics, both would find tremendous fields to work in. Some scientists are very pedantic and therefore intolerant in their pedantry and they may say “the fellow should learn first how to express himself and then ask our attention.” My answer is that the problems involved are too pressing, too vital, too fundamental for humankind, to permit me to delay for perhaps long years before I shall be able to present the subject in a correct and satisfactory form, and also that the problems involved cover too vast a field for a single man to work it conclusively. It seems best to give the new ideas to the public in a suggestive form so that many people may be led to work on them more fully. The old word “metaphysics” is an illegitimate child of ignorance and an unnecessary word in the scientific study of nature. Every phenomenon of nature can be classed and studied in physics or chemistry or mathematics; the problem, therefore, is not in any way _super_natural or _super_physical, but belongs rather to an unknown or an undeveloped branch of physics. The problem, therefore, may be not that of some _new_ science, but rather that of a new branch of mathematics, or physics, or chemistry, etc., or all combined.