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.

Ventilation, importance of, 7;
motion, coolness, humidity, and freshness, of air chief features
of, 7;
overemphasis of danger from drafts, 8-9;
by means of windows, 9;
use of window-boards, 9-10;
air-fans as a help in, 10;
heating systems and, 10-11;
importance of cool air and enervating effect of hot, 10-11;
dryness and humidity of air, 11-12;
relation of clothing to, 14-18;
necessitated by conditions of civilization, 147;
as a preventive of colds, 275.

Vermin, diseases spread by, 74-75.