Process of bacterial attack, 307. Production of diphtheria antitoxin, 403. Protection, against mosquitoes, 385; against smallpox, 398. Proteids in food, 260. Ptomaines, 250. Pump for deep well, 106. Pumping water, 168. Purity of water-supply, 131. Quantity of water in stables, 94; of water per person, 92; of water used, 90. Quarantine, regulations, 422; for scarlet fever, 369. Quinine and malaria, 378, 386. Rabies, 406; antitoxin, 309. Radiators by windows, 79. Rain-water, storage, 101; supply, 99. Rates of water consumption, 95. Rations for daily use, 263. Register in the ceiling, 85. Remedies, for consumption, 340; for pneumonia, 347. Reservoir, for brook supply, 126; on a brook, 102. Resistance, of body to disease, 297, 308; to tuberculosis, 335. Rest for consumptives, 340. Results of measles and scarlet fever, 366. Rochester and the milk supply, 237. Rock formations and hygiene, 35. Roof of spring-chamber, 157. Rubber boots, 283. Running trap for main drain, 201. Rusting of driven-well casing, 119. Saliva from mouth, 260. Sand filter beds for sewage, 219. Scarlet fever, and milk, 240; preliminary symptoms of, 367; quarantine, 369. Scarlatina, 369. School vaccination, 412. Scurvy and fresh vegetables, 266. Sedimentation of sewage, 227. Septic tanks, 229. Sewage disposal, 208. Sewage-sick land, 214. Sewage treatment on land, 213. Sewer pipe in wells, 105. Sewers and sickness, 36. Sex and age in disease, 299. Shallow wells, 113. Sinks, for kitchen, 196; and their discharges, 214. Size, of openings for fresh air, 85; of pipe for conveying water, 166; of spring reservoir, 156; of waste weir, 163. Slaughter-houses, 255. Sleep, 292. Smallpox, 396; and chicken pox, 399; instead of chicken pox, 376. Smoking and its effects, 275. Soap, as an antiseptic, 326; its relation to hard and soft water, 134. Soil, air and its exclusion, 49; for disinfection, 331. Soil-pipe in house, 201. Somerville typhoid epidemic, 359. Sources of water-supply, 108. Space between houses, 30. Spring-chamber, 157. Spring, extensions, 123; reservoirs, 155. Springs, 121; and their formation, 109. Squirrels, and the bubonic plague, 395; in the attic, 30. Stables, and dirty milk, 237; and water consumption, 94; for clean milk, 242; space required per cow, 63; ventilation, 86. Stamford typhoid epidemic, 359. Steam, for disinfection, 329; pumps, 179. "Stegomyia mosquito," 386. Sterilization of milk, 234. Stone dam, 159. Storage, on a brook, 102; reservoirs, 127; tank for rain-water, 101. Stoves used in ventilation, 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.