Throat or pharynx, 137 bacterial flora in, 151 description of, 158 diseases of, causes of, 158 effect of lowered vitality on, 151 importance of healthy condition of, 151, 159 pillars of, 158 sore, prevention of, 160 treatment of, 160, 161 Toe-nails, ingrowing, 78 Tonsils, chronic enlargement of, 159 Trachea, 143 Trachoma, 214, 215 Tropics, dietary in, 121 Trypsin, 93 Tubercle bacillus, 150 destruction of, 174 Tuberculosis, causes of, 137, 150, 309 diet in, 172 disinfection after, 174, 175 expectoration in, 150, 173 infection in, 150, 173 source of, 173 mortality in, 137 prevention of, 171-174 Turkish baths, 42-44 cold plunge, 43 contraindications to, 31, 37 contraindications for their use, 44 essential features of establishment, 42 harmful results of too prolonged stay in, 42 indications for their use, 44 methods of procedure, 42-44 necessity for cold water drinking, 42 physician’s prescription for, 43 shampoo, 43 steam room, 43 contraindications for use of, 43 Underclothing, combination suits, 280 winter, 278-281 equestrian tights, 280 essential qualities of, 278 Urea, 106 Uric acid, 106 treatment of, 45 Urinary excretory apparatus, 179 Urine, 178 daily amount of, 178 secretion of, 176 specific gravity of, 178 toxicity of, 178, 179 urea, 178 uric acid, 178 value of study of, 178 Uvula, relaxation of, 158 Vacations and health, 201, 202 resorts, requisites for, 202 rules for, 202 Vaginal irrigations, 54-56 directions for, 54, 55 indications for use of, 55 Vassar College, 235 gymnasium, 325-328 Veils, 210 Ventilation, 151-155 method of, 154 necessity for indoor, 151 hourly amount of fresh air needed, 151 of bed-clothes, 157 of bedrooms, 156 of houses, 151-155 of lungs, 165-168 Vision, defective. See _Optical defects_. Visual apparatus, 205, 206 accommodation, mechanism of, 206 conjunctiva, 205 description of, 205 eyeball, 205 eyelashes, 205 eyelids, 205 image, formation of, 206 iris, 205 function of, 206 lachrymal glands, 205 tears, function of, 205 Vitamins, 108 Vocation, physiologic necessity for, 247 Clouston on, 248 Thomas on, 248, 249 Waist exercises, 349, 351, 356 Walk, listless, bad effects of, 364 Walking, clothing for, 282, 363 effect of speed in, 293 on blood-vessels and muscles, 363 effect of, on heart and lungs, 362 position of feet in, 341 skirt, 281 proper length of, 281 Walks, rules for long, 364 Wash cloths, care of, 61 danger of infection from, 61 Waste products, nitrogenous, 106