=Vocalisation=, 138, 231, 327, 330, 338; change in quality of voice, 192, 308; vocal chords, 228; vocal control, 278, 295; loss of voice, 266, 336. =Volition=, v. =Will=. =Walking=, 179, 264, 267, 270, 279–283, 332; in children, 120. =War=, 8; the present crisis, 157 ff., 164, 167 ff., 175; discussion of causes of, 160; re-adjustment after, 144. =Will=, 38, 86, 99, 203, 215, 333; the will to live, 42, 99; will-power in relation to overindulgence, 59. =Wish=, meaning of, with reference to the eradication of bad habits, 103 ff. =Worry=, 44, 252 ff. =Yogis=, system of breathing, 56. ----- Footnote 1: Modern investigators, however, almost unanimously incline now to the theory that the cause of cancer is a morbid proliferation of the cells not due to the primary influence or isolation of alien bacteria. Footnote 2: It should, however, be clearly understood in this connection that certain laws of natural selection must, so far as we can see, always hold good; and it would not be advisable to alter them even if it were possible. For example, that curious law may be cited which ordains the attraction of opposites in mating and so maintains nature’s average. The attraction which a certain type of woman has for a certain type of man, and vice versa is, in my opinion, a fundamental law, and any attempt to regulate it would be harmful to the race. This, however, is no argument against the regulation of prevention of marriages between the physically and mentally unfit. Footnote 3: For a further statement of one aspect of heredity, see Chapter VI of this book. Footnote 4: For a fuller analysis of this, see p. 92 et seq. of this volume. Footnote 5: For fuller explanation, see Chapter VI, p. 147. Footnote 6: See Part II, p. 189. Footnote 7: Cf. _Hypnotism_, by Albert Moll. Good cases of suppuration, blistering, and bleeding, as the result of suggestion without any preliminary abrasion of the skin, are those supplied by the records of Professor Forel’s experiments at the Zurich Lunatic Asylum. These experiments were conducted on the person of a nurse who is described as the daughter of healthy country people, and not a hysterical subject. Footnote 8: There is much evidence on this point, some of it conflicting, but the main fact must be considered above question. Footnote 9: Cf. Herbert Spencer, _Education_, Chapter XI, “Humanity has progressed solely by self-instruction.” Footnote 10: Moreover, I deny that hypnotism can possibly succeed except in comparatively rare instances. It is not universal in its applicability. Footnote 11: