Menstruation, 181-183 anomalies of, 183 painful, 183 profuse, 183 scanty, 183 suppressed, 183 treatment of, 182, 183 hygiene of, 181 normal, average duration of, 181 character of, 181 cold baths during, 181, 182 exercise during, 182 premonitory symptoms of, 181 Mental activity, attitude and bodily function of, 242 depression, 231 development, 189, 190, 228-232, 233, 241 and physical training, 290-292, 295, 315, 320 disorders of adolescence, 231 emotions, exhausting nature of, 245-247 faculties, balance of, 234 habits, 186, 187 hygiene, 224-247 hurry, effect of, 190 qualities, 228 Metabolism, 98 cumulative effects of impure air on, 153 effect of nitrogenous diet on, 99 water and, 100 Microörganisms in intestinal canal, 97 Migraine, treatment of, 218 Milk, digestion of, 111 Mind hygiene, relation of, to physical health, 224-251, 320 subconscious, 238 Mineral substances, 107 Vittel, 51 Moral sense, 230, 231 Mothers as educators, 224 exhausted, 197 Mountain climbing, 365 Mouth, care of, 82 cleansing of, 82 Muscular system, 298-304 action of muscles of abdomen, 300 of back, 301 coördination, 304 development prevented by corsets, 260, 261, 264-268, 270, 271 energy, 303 fatigue, 303 heat production, 303 Nasal catarrh, causes of, 159 general treatment, 151 local, 160, 161 prevention of, 160 douche, 161 passages, obstruction of, 158 sprays, 160 prescriptions for, 161 Nature’s restoratives, 196-200 recreation, 198, 200 rest, 197 sleep, 198, 202, 203 Near-sightedness, causes of, 206, 207 correction of, 207 Nervous breakdowns, prevention of, 197, 199, 201 disorders, causes of, 216 functional, 215, 223 headache, 216-219 neurasthenia, 219 system as balance of power, 184 brain as master organ of body, 184 function of, 184 physiology of, 187 cerebrospinal nerves, 187 spinal cord, 187 sympathetic, 188 Nervousness, 196 causes of, 196 treatment of, 305 Neurasthenia, 219-223 causes of, 219, 220 rational treatment, 221-223, 305 symptoms of, 221 Nitrogenous waste products, 106 Nose, care of, 157 functions of, 157 Obesity, causes of, 132, 298 treatment of, 45, 52, 298, 344 Occupation, definite, a physical necessity, 247 Clouston on, 248. See _Vocation_. sedentary, 165 Optical defects and their correction, 206-209 astigmatism, 208 hyperopia or far-sightedness, 207 myopia or near-sightedness, 206 causes of, 207, 209 treatment of, 207 presbyopia or loss of accommodation, 207 Outdoor exercise, 362 daily length of time for, 362 Overwork, 193, 194 danger signals, 193 signs of, 194-196 stimulants in, 193 worry and, 195