338 BLUSHING. CHAP. XIII. tion, it will be necessary to give a considerable body of details, bearing more or less directly on this subject. Several observers/3 who from their wide experience and knowledge are eminently capable of forming a sound judgment, are convinced that attention or consciousness (which latter term Sir H. Holland thinks the more ex- plicit) concentrated on almost any part of the body pro- duces some direct physical effect on it. This applies to the movements of the involuntary muscles, and of the voluntary muscles when acting involuntarily.,—to the secretion of the glands,—to the activity of the senses and sensations,—and even to the nutrition of parts. It is known that the involuntary movements of the heart are affected if close attention be paid to them. Gratiolet34 gives the case of a man, who by continually watching and counting his own pulse, at last caused one beat out of every six to intermit. On the other hand, my father told me of a careful observer, who cer- tainly had heart-disease and died from it, and who posi- tively stated that his pulse was habitually irregular to an extreme degree; yet to his great disappointment it 33 In England, Sir H. Holland was, I believe, the first to consider the influence of mental attention on various parts of the body, in his ' Medical Notes and Inflections,' 1839, p. 64. This essay, much enlarged, was reprinted by Sir H. Holland in his 'Chapters on Mental Physiology,'* 1858, p. 79, from which work I always quote. At nearly the same time, as well as subsequently, Prof. Laycock discussed the same subject: see ' Edinburgh Medical and Surgical Jour- nal,' 1839, July, pp. 17-22. Also his ' Treatise on the Nerv- ous Diseases of Women,' 1840, p. 110; and ' Mind and Brain,' vol. ii. 1860, p. 327. Dr. Carpenter's views on mesmerism have a nearly similar bearing. The great physiologist Miiller treated (' Elements of Physiology,' Eng. translat. vol. ii. pp, 937, 1085) of the influence of the attention on the senses. Sir J. Paget discusses the influence of the mind on the nutrition of parts, in his ' Lectures on Surgical Pa- thology,' 1853, vol. i. p. 39: I quote from the 3rd edit, re- vised by Prof. Turner, 1870, p. 28. See, also, Gratiolet, De la Phys. pp. 283-287. 84 De la Phys. p. 283.