tion, 82.

Strainer for milk-pail, 246.

Stream, pollution, 210;
supplies, 158.

Subsurface, irrigation field, 224;
sewage disposal, 223.

Sulfur as a disinfectant, 318.

Sunlight as a disinfectant, 331.

Supply tank for domestic plumbing, 192.

Surface use of land for sewage treatment, 216.

Swamps and malaria, 381.

Symptoms of diphtheria, 401,404;
of smallpox, 399;
of yellow fever, 387.

Syphons, for automatic discharge, 225;
for septic tanks, 229.

Systems of house drainage, 45.

Tanks, for sedimentation, 228;
for water storage, 183.

Tannin in tea, 274.

Tapeworm, 303.

Tar, for cellar walls, 53;
paper for water-proofing, 54.

Tea as a drink, 273.

Teeth and their care, 291.

Tetanus, 408.

Thymol for hookworm disease, 390.

Tile pipe line, 166.

Tobacco and its effects, 275.

Topography and hygiene, 34.

Toxic action, 308.

Transmission of typhoid fever by polluted water, 145.

Traps for plumbing, 204.

Trap-vents, 203.

Treatment, of hydrophobia, 408;
of sewage on land, 213;
of smallpox, 400;
of typhoid fever, 361.

Trees and the hygienic home, 30.

Trichinosis, 253, 303.

Tuberculosis, 332;
and milk, 240;
death-rates, 18;
in the country, 19;
in the United States, 18.

Tuberculous meats, 251.

Typhoid bacillus, 351.

Typhoid fever, 308, 349;
and milk, 238;
epidemic at Butler, Pa., 146;
epidemic at Caterham, England, 145;
epidemic at Kerhonkson, N. Y., 150;
epidemics, 354;
in ice, 353;
in New York State, 13;
in small cities, 14;
in Spanish-American War, 360;
rates in the country, 12.

Unadilla Valley and cancer, 34.

Uncinariasis, 389.

Underdrains for sewage disposal, 231.

Underground waters, 109.

Underwear, 281.

United States Department of Agriculture and diseased meat, 251.

University of Pennsylvania radiators, 79.

Use of cement in well walls, 115.

Vaccination, 397.

Variation in maximum rates of water use, 96.

Vegetable, beds and sewage, 218;
pollution of water, 135.

Ventilation, 68;
experiments on hens, 71;
by stoves, 82;
of bedrooms, 283;
of cellars, 60;
of stables, 86;
through walls, 72.

Vents for traps at fixtures, 203.

Vitality of the typhoid germ, 352.

Volume, of sewage, 209;
of space in cow stables, 63.

Vomiting in whooping cough, 374.

Walls for spring reservoirs, 155, 156.

Wash-basin in bath-room, 199.

Washing, milk-pai