The reactions in movement upon these suggestions are very marked and appropriate, in customary or habitual lines, although the stimulations are quite subconscious. The clearest illustrations in this body of my experiences were afforded by my responses in crude songs to the infant's waking movements and breathing sounds. I have often waked myself by myself singing one of two nursery rhymes, which by endless repetition night after night had become so habitual as to follow in an automatic way upon the stimulus from the child. It is certainly astonishing that among the things which one may get to do automatically, we should find singing; but writers on the subject have claimed that the function of musical or semi-musical expression may be reflex. The principle of subconscious suggestion, of which these simple facts are less important illustrations, has very interesting applications in the higher reaches of social, moral, and educational theory. _Inhibitory Suggestion._--An interesting class of phenomena which figure perhaps at all the levels of nervous action now described, may be known as Inhibitory Suggestions. The phrase, in its broadest use, refers to all cases in which the suggesting stimulus tends to suppress, check, or inhibit movement. We find this in certain cases just as strongly marked as the positive movement--bringing kind of suggestion. The facts may be put under certain heads which follow. _Pain Suggestion._--Of course, the fact that pain inhibits movement occurs at once to the reader. So far as this is general, and is a native inherited thing, it is organic, and so falls under the head of Physiological Suggestion of a negative sort. The child shows contracting movements, crying movements, starting and jumping movements, shortly after birth, and so plainly that we need not hesitate to say that these pain responses belong purely to his nervous system; and that, in general, they are inhibitory and contrary to those other native reactions which indicate pleasure. The influence of pain extends everywhere through mental development, however. Its general effect is to dampen down or suppress the function which brings the pain; and in this its action is just the contrary to that of pleasure, which furthers the pleasurable function.