Overworked class, rest treatment for, 222, 223 Oxygen, importance of, 145 Palate, soft, 158 Pancreatic juice, 93 rennin, 93 Perspiration, daily amount of, 26 effect of, on tone of skin, 29 rate of increase in hot baths, 28 Pharynx. See _Throat_. Physical efficiency, 11 an exact science, 13 marks for, 13, 317 reflex effect of group impairment on organism, 19 standardized percentage table, 14, 328 statistical study, 15 wisdom of, 11 exercise, rules for, 334-336 measurements, record for, 327, 334 status of women of to-day, 19 training among the ancients, 283, 284, 289 before twelve years of age, 333 dancing, 289, 326 examinations for, 326, 327 Physical training for invalids, 334 improved physique from, 286, 325 influence on life and health, 290 key to health and beauty, 283-322 of girls, 286, 289, 321, 333 of Japanese women, 286 report of Royal Commission on, 288 Physique, good, through physical training, 333 improved, of American women, 287 of school children, 287 Play, adult, 288 Pleasure seeking as the object of life, 189, 247, 249 Pneumonia following influenza, 169 mortality from, 171 Potatoes, 111 Prosecretin, 92 Proteins, 105 Pulley weights, exercises with. See _Chest weights_. Pulse, frequency of, 140 Reading, distance of book from eyes, 165 fine type, 212 hygienic precautions, 212, 213 length of line, 212 position of reader in, 212 Recreation, necessity for, 220 Religion, 232 Religious instincts, 231, 232 Rennin, pancreatic, 93 Respiration during sleep, 166 forced, benefits of, 165, 166 impediments to normal, 164 Respiration, mechanics of, 138, 141 normal, relation to body heat, 146 types of, 167 costal, 167 diaphragmatic, 167 thoracic, 167 vitiation of air in, 152 Respiratory exercises, 165-168, 345 beneficial results of, 311 best time for, 166, 167 dress for, 166 frequency of, practice of, 166 system, 137-157 air cells, 143 bronchial tubes, 144 expiration, 143 inspiration, 143 forced, 144 function of abdominal muscles, 146, 344 larynx, 143 lungs, 143 hygiene of, and relation to general health, 146 secretion of, 145 vital capacity of, 144 thorax, 138 trachea, 143 Rest, 197 days of, 200, 201 proper way to, 197, 198 regularity of, 197 Rice, 111 Roman baths, 43 Rowing, 369 Running, 293, 364 age limit for, 365 benefits of, 310 rules for, 341 Saliva, 88 Salt, common, 101 normal, solution, 53 sea, 41 Sargent, Dr. Dudley A., 284, 285, 287, 317, 321 Scalp, massage of, 74 Sebaceous glands, function of, 25 infection through, 25 Secretin, 92