Drain, fall of, 27. house, 35. house, trap in, 42. location of, 27. pipes, 59. size of, 27. Drainage, 21. diagram of, 49. essentials of, 24. examination of, 61. of city houses, 65. of country houses, 50, 65. of farm-houses, 65. of sea-side houses, 65. New York City Board of Health, 25. subsoil, 50. Drains, defective, 52, 59. Draughts, how produced, 17, 20. how to avoid, 20. when perceived, 17. Drinking-water, tanks for, 33, 86. tests of, 89. Durand-Claye, 13. Durham house-drainage system, 44. Dysentery, precautions _vs._, 72. propagation of, 14. Earth as a disinfectant, 23. closet, 23. Earthenware pipes, 26, 59, 100. Egyptian Disinfectant, 98. Engelhardt,, Ph. D., 76, 79, 82, 84, 85. Erysipelas, propagation of, 14. Evaporation from traps, 60. Excelsior Disinfectant, 98. Excreta, contamination of air by, 14, 21. dangers from, 14, 21. removal of, 24. Exhaust-steam in soil-pipes, 33, 50. Farm-houses, drainage of, 65. Faulty construction of drains, 52. Ferrules, 30, 45, 52. Fever, malarial, 14. puerperal, 14. scarlet, 11, 72. typhoid, 14, 72. typhus, 11, 73. yellow, 14, 72. Field’s flush-tank, 50. Filters, 87. Fireplace, Galton’s, 18, 19. Fireplaces, 18. Flanges, lead, 53. Flues for ventilation, 20. Flush-tank, 50. Fomites, 71, 73. Food, 73. Fresh-air inlet, 28, 43. Fruits, canned, 77. Fumigation, methods of, 68, 69. precautions during, 70. treatment of rooms after, 70. Funerals, 71. Furniture, disinfection of, 69. of sick-room, 68. Fusel-oil, 76, 84. Galton’s fireplace, 18, 19. Gas, sewer, composition of, 12. Gasket, 45. General debility, 11, 13. German measles, 12. Germicide, 98. Gin, 79. Girondin Disinfectant, 98. Glucose, 75, 79, 82. Grains, cereal, 78. Green vitriol, 70, 93. Ground air, danger of, 15. air, exclusion of, 66. water, high and low, 15. Gum-drops, 77. Gypsum, 74, 79, 94. Hand-holes, 59. Heat, disinfection by, 94. Honey, 79. Hops, 75. Horizontal pipes, 28. Horse-radish, 79. Hospital gangrene, 14. House-drain, 35. drain, trap in, 27, 42. drainage, Durham system of, 44. drainage, essentials of, 24. sewer, material of, 26. Hydrant-sinks, 35. Hydrochloric acid, 93. Impurity of air, measure of, 9. Inlet, fresh-air, 28, 43. Iodide of potassium, 89. Iron, sulphate of, 93. Iron pipes, weight of, 29. Isinglass, 79. Jellies, 79. Joints, calking of, 45, 52. cement, 52, 59. imperfect, 59. lead, 45, 52. putty, 52, 59. Joints, rust, 30, 45. wiped, 46. Labarraque’s Solution, 99. Labor, plumber’s, 102. Lactometer, method of using, 81. Lard, 80. Lattimore,, Ph. D., 77-79, 82-84.