, 269.

Analysis of proposed water-supply, 143.

Animal heat in barn, 88;
pollution of water, 136.

Animals, fit for butchering, 306;
in the study of disease, 250.

"Anopheles" mosquito, 380.

Antiseptics, 316; in milk, 235.

Antitoxin, 306; and disease, 396;
for diphtheria, 403;
for hydrophobia, 408;
for tetanus, 408;
for typhoid fever, 363.

Apparatus for driving wells, 119.

Appendicitis, 33.

Appetite for food, 266.

Application of sewage to land, 218.

Area for subsurface sewage disposal, 223.

Artificial sewage beds, 219.

Asphalt for cellar walls, 53.

Auto-intoxication, 312.

Automatic sewage syphon, 225.

Babylon, L. I., water-supply, 187.

Bacillus of typhoid fever, 351.

Back of cellar walls, 56.

Bacteria, and parasites, 302;
and sewage purification, 213; in milk, 235.

Bacterial agencies, 304.

Bad air and its effects, 69.

Balanced rations, 263.

Barn ventilation, 88.

Barnyard drainage, 141.

Bathing for hygienic purposes, 285.

Beneficent bacteria, 304.

Billings's suggestion for ventilation, 80.

Billings's ventilation by stoves, 83.

Blankets, 281.

Blood resistance and disease, 297.

Bob-veal, 252.

Boiler for hot water, 198.

Boiling water for disinfection, 329.

Boston, Mass., water used in, 93.

Box radiators at window, 80.

Bright's disease in the country, 20.

Brooks as water-supply, 124.

Brush dam, 163.

Bubonic plague, 393.

Bucket water wheel, 175.

Cancer and soils, 33;
in Europe, 34.

Carbohydrates and digestion, 261.

Carbolic acid as disinfectant, 322.

Carbon dioxid in the air, 75.

Causes of typhoid fever, 350.

Cell disintegration, 297.

Cellar, floors, 59;
in limestone rock, 47;
ventilation, 60;
walls of dry masonry, 55.

Cellars and their drainage, 28.

Cement joints for well walls, 115.

Cesspools and wells, 116.

Changes in air breathed, 75.

Chemical poisons, 311.

Chicken pox, 375;
preliminary symptoms of, 367.

Children, as affecting the death rate, 8;
in Otsego and Putnam counties, 9.

Children's diseases, 364.

Chloride of lime, 325.

City milk, 247.

Cleanliness of stables, 63.

Clean milk, 242, 421.

Clean stables and their effects, 237.

Clothing, 280.

Coal-tar disinfectants, 323.

Coffee and tea, 272.

Cold baths, 286.

Composition, of air, 75;
of soils, 32.

Computations for rain-water storage, 101.

Concrete, core for dam, 159; d