Toeing out and toeing in, 60, 223. Tomatoes, cellulose in, 41; vitamins supplied by, 42; food value of, 176. Tongue, cleansing, with tooth-brush, 85. Tooth powders and pastes, use of, 85. Toxæmia, autointoxication distinguished from, 81-82. Traits, subdivisibility of each individual into, according to Mendelian discovery, 295; rules resulting from inheritability of, 296; physical, known to act hereditarily, 297; mental, 297-298; moral, 298; laws governing inheritance of, 293; distribution of, 298-300; socially noble and ignoble, 300-301; mating of, in marriages, 304-305; maturing of, at certain ages, 306; dominant and recessive, 317-319; need of education on inheritability of, 323. Tree-swaying exercise for faulty posture, 222. Tuberculosis, outdoor sleeping as a remedy for, 21; sometimes produced by the "consumptive stoop," 57; infection from germs of, 71; remote causes of, 123; primarily a house disease, 146; liability of different races to, 147; public and individual hygiene invoked in fight against, 159; resistance to, weakened by alcohol, 240; trend of death rate from, 285; application of science of eugenics to, 299. Typhoid fever, death rate from, 285. Typhoid germs, guarding against, 72-73. Typhus, carried by lice, 75. Ulcer of the stomach, sometimes caused by focal infection, 82. Underclothes, benefits of loose, porous, 14; suitable material for, 17. Underweight, relation of, to longevity, 30-32; determination of, 31; remedy for, 33; life insurance statistics as to, 219; diet for, 219-220; exercise for, 220. United Kingdom, consumption of alcohol in, 235, 236. United States, consumption of alcohol in, 235, 236; trend of death rate in, 281-285; comparison of death rate with those of other countries, 286. Unity of hygiene, 121-126. Uric acid, caused by purins in diet, 39. Urinary system, death rates from diseases of, 284, 285. Vaccination, overcoming prejudice against, 163. Vacuum cleaners, advantages of, 13. Variety, need of, in work, 92. Vegetables, bulky foods, 29; suitable diet for middle life, 33-34; objection to some, on account of richness in protein, 39-40; cellulose supplied by, 41; vitamins supplied by, 42; acids supplied by, 43; among the best foods, 48; laxative food, 52; table of food values of, 175-176. Venereal diseases, infections from, 77-78; resistance to, weakened by alcohol, 240.