protein, 38-39.

Running, a beneficial exercise, 94.

Saccharin, harmful in foods, 65.

Salt, to be used sparingly, 48.

Salts, inorganic, in mixed diet, 43.

Sandals, benefits and risks in wearing, 17.

School, teaching correct posture in, 63.

Schools, outdoor, 19.

Segregation of defective classes, 321-322, 323.

Self-respect, relation between erect posture and, 63-64.

Serenity, to be practised as an art, 113.

Setting-up exercises, 221-224.

Sex hygiene, eugenics not limited to, 293-294.

Sex instruction, 77-78.

Shaler, N. S., "Man and the Earth," quoted, 143-144.

Shell-fish, a high-protein food, 38;
special objections to too great an amount of, 39.

Shoes, care necessary in choosing proper, 16-17.

Shredded wheat biscuit, food value of, 29, 181.

Signal-station exercise, for faulty posture, 222.

Singing, as a hygienic practise, 26.

Sitting, correct posture in, 60-62.

Skim milk, a cheap source of protein, 131.

Skin training, establishing resistance to colds by, 273-274;
means of, 274-275;
by wearing light, porous clothing, 275.

Sleep, one of the two great forms of inactivity, 89;
means of inducing, 102-103;
importance of, to health, 103;
hours of, 103;
eating before, 103-104;
use of pillows, 104;
type of bed, 104;
effect of mental attitude on, 104-105.

Sleeping, out-of-door, 3, 20-24, 104;
a preventive of colds, 9, 276;
for underweight, 220.

Sleeping porches, arrangement of, 22-23.

Sleeping tents, 23-24.

Social evil, remote causes of, 123;
cooperation needed in movement against, 163.

Soups, food values of, 183.

Sour milk, among the best foods, 48;
a means of reducing decomposition of protein in the colon, 56.

Specialists, medical, "one idea" doctrines of, 122.

Spinach, cellulose in, 41.

Spinal curvature, sometimes caused by faulty posture, 62.

Sponge-cake, food value of, 29, 179.

Squash, cellulose in, 41.

Standing, correct posture in, 58-59.

Starch, cheap sources of, 131.

Sterilization of defectives, 323.

Stevenson, R. L., on duty of being happy, 115.

Sugar, food value of, 30, 182;
danger from overuse of, 48;
cheap sources of, 131;
taking of, for underweight, 220.

Sunlight, benefits of, to air, 14.

Sweden, American ideals of perfect manhood and womanhood inferior to
tho