It is related that St. Francis d'Assisi dwelt so long in concentrated meditation upon the thought and picture of the Crucifixion that he suffered intense pain in his hands and feet, at the points corresponding to the place of the nails in the hands and feet of Christ, which was afterward followed by marked inflammation at those points, terminating in actual ulceration. The phenomena of the _stigmata_ in the cases of religious enthusiasts and fanatics has been mentioned elsewhere in this book. Prof. Barrett says of the phenomenon: "It is not so well known, but it is nevertheless the fact, that utterly startling physiological changes can be produced in a hypnotized subject merely by conscious or unconscious mental suggestion. Thus a red scar or a painful burn, or even a figure of a definite shape, such as a cross or an initial, can be caused to appear on the body of the entranced subject solely through suggesting the idea. By creating some local disturbance of the blood-vessel in the skin, the unconscious self has done what would be impossible for the conscious to perform. And so in the well-attested cases of _stigmata_, where a close resemblance to the wounds of the body of the crucified Saviour appears on the body of the ecstatic. This is a case of unconscious self-suggestion, arising from the intent and adoring gaze of the ecstatic upon the bleeding figure on the crucifix." Dr. Schofield says: "The breath is altered by the emotions. The short quiet breath of joy contrasts with the long sigh of relief after breathless suspense. Joy gives eupnoea or easy breathing, grief or rather fear tends to dyspnoea or difficult breathing. Sobbing goes with grief, laughter with joy, and one often merges into the other. Yawning is produced by pure idea or by seeing it, as well as by fatigue. Dr. Morton Prince says a lady he knew always had violent catarrh in the nose (hay fever) if a rose was in the room. He gave her an _artificial_ one and the usual symptoms followed. How many cases of hay-fever have a somewhat similar origin in the unconscious mind?... The hair may be turned grey and white by emotion in a few hours or sooner. With regard to the stomach and digestion, apart from actual disease, we may notice one or two instances of unconscious mind action. A man who was very sea-sick lost a valuable set of artificial teeth overboard, and was instantly cured. If the thoughts are strongly directed to the intestinal canal, as by bread-pills, it will produce strong peristaltic action. Vomiting occurs from mental causes, apart from organic brain disease. Bad news will produce nausea; emotion also, or seeing another person vomit, or certain smells or ideas, or thoughts about a sea-voyage, etc., or the thought that an emetic has been taken.... The thought of an acid fruit will fill the mouth with water. A successful way of stopping discordant street music is to suck a lemon within a full view of a German band. Fear will so dry the throat that dry rice