Headache, purpose and meaning of, 12, 13, 367-376; treatment of, 370, 371, 381-386; from eye-strain, 377, 386; from digestive disturbances, 377, 378; sick headache, 378, 379, 381; from stuffy rooms, 380; from sluggish bowels and kidney trouble, 380; from loss of sleep, 380, 381; from nasal obstruction, 381; rest the cure for, 382-384; massage for the relief of, 385, 386; the nerves affected in, 385, 386. Heart, effect of rheumatism on, 314, 315. Heredity, in health and disease, 32-54. Hernia, 36. Holmes, Oliver Wendell, 125. Horses, and disease, 344, 345. Hospitals, blood-poisoning and antisepsis in, 335-339. Humoral theory of disease, 17, 18. Huxley, Thomas Henry, quoted, 1, 112, 201. Hysteria, 403, 406, 407, 435. Imaginary illness, 415-422, 436. Immunity, 93. Indians, epidemics among, 251, 252. Indifference of the dying, 434. Infants, diagnosis in the case of, 81, 82. Influenza, 90. Insanity, heredity and, 52-54; among savages and in civilization, 408, 409; treatment of, 411, 412. Intestines, 274. James, William, 425. Johnson, Samuel, 89. Joints, diseases of, 318, 319. King, Dr. Albert F. A., 298. Koch, Robert, 126, 152, 153, 155, 156, 228, 308. Laveran, 295. Lister, Lord, 332. Liver, functions of, 6, 7. Lockjaw, 344-346, 397, 398. Locomotor ataxia, 399; diagnosis of, 77, 78. Lungs, their liability to disease, 175-178. Lupus, 126. Malaria, 289-310. Measles, 243, 246, 248-252, 260-263. Medicines, repulsive, 17. Meningitis, 399, 400. _See also_ Cerebro-spinal meningitis. Mental influence in disease, 411-437. Metschnikoff, Elie, 214. Meyer, William, 105. Mind, its relation to the body, 390, 391, 411-437. Mosquitoes, and malaria, 297-307. Mouth-breathing, 103-119. Moxon, the pathologist, 187. Mumps, 252. Nails, the, in disease, 74, 75; pus-germs lurking under, 334, 336, 349. Nature, as a physician, 2, 3; not to be trusted too blindly, 7; cooeperating with, 9. Nerves, affected in headache, 385, 386; old notions of, 387, 388; reality of, 389, 390; function of, 390; their diseases due to morbid changes in their tissues, 391, 392; affected by the bodily condition, 393-395; causes of disturbances in, 395-397; diseases that attack them directly, 397, 398; late effects of other diseases on, 398-401; nervousness and, 401-408; death-rate from diseases of, 409, 410. Nervousness, 403-408. Neurasthenia, 401, 402. Nocard, the veterinary pathologist, 157. Northrup, Dr. William, 196. Noses, narrow, 118, 119. Operations. _See_ Surgery. Opiates, 431, 432. Osler, Dr. William, 160, 282. Ovariotomy, 336. Pain, nature's command to halt, 13, 382; nature's automatic speed regulator, 383. Paresis, 399. Pimples, 38. Pituitary body, 119.