Lead, chromate of, 77. dissolving of, in water, 86. flanges, 53. nitrate of, 95. Leaders, bad odors from, 53. as soil-pipes, 33, 49. trapping of, 33, 53. Lead pipes, weight of, 101. Letheby, 13. Lime, 94. chloride of, 93. sulphate of, 94. Louvered sky-light, 39. Love,, Ph. D., 74-76, 78. Malarial fevers, 14. Manganese, oxide of, 93. Marsh-gas, 13. Measles, precautions _vs._, 72. propagation of, 11. Meat, 80. Meats, canned, 78. preserved, poisoning by, 80. Mercuric chloride, 94. Mercury seal for traps, 39. Metropolitan Disinfectant, 99. Microscopic organisms, 11, 43. Milk, composition of, 81. Mines, air of, 7. Morin, estimate by, 19. Movable tanks for excreta, 22. Mumps, 12. Munsell,, Ph. D., 81. National Board of Health, rules, etc., 67. Nichols, Professor, 8, 12, 87. Nitrate of lead, 95. of silver, 88. Nitrates, tests for, 89. Nitric acid, 88. Nitrites, test for, 89. Nitrogen, 7. in sewers, 12, 13. Nitrous acid, 95. New York City Board of Health, rules, etc., 25. New York State Board of Health, rules, etc., 74. Oakum, 45. Odors, offensive, 52. Offsets, 35, 100. Oil, dead, 92. fusel, 76, 84. of cognac, 76. of peppermint, 63. olive, 81. Oleomargarine, 76. One trap, etc., how determined, 58, 62. Organic matter of respired air, 9. matters, test for, 89. Organisms, microscopic, 11, 43. Overflow-pipes, 32, 33, 46, 54, 58. Oxidation, 15, 43. Oxide of manganese, 93. Oxygen, 7, 8, 13. Ozone, 95. Pails for excreta, 22. Paris, plaster-of-, 94. Peppermint test, 63. Permanganate of potash, 95. Pettenkofer’s test for carbonic acid, 9. Phenix Disinfectant, 99. Phenol Sodique, 99. Phosphorus, 95. Pickles, 82. Pipe connections, 30, 52. Pipes, air, 31. air-bound, 57. cast-iron, 27, 28, 44, 101. corrosion of, 50, 59. drain, 27, 59. earthenware, 26, 100. galvanized iron, 59, 86. hub-end of, 44. iron, weight of, 29. lead, weight of, 101. obstruction of, 61. overflow, 32, 33, 46, 54, 58. rat-holes in, 59. service, 86. spigot-end of, 44. tarring of, 44, 101. traps on vertical, 29, 44. ventilating, size of, 31. waste, 28. wrought-iron, 44. Pitt,,, 77, 79. Plants, action of air on, 15. Plaster-of-Paris, 94. Platt’s chlorides, 99. Plumber’s labor, 102. materials, 101, 102. Pork, 80. Potash, permanganate of, 95. Potassium, iodide of, 89. Powders, calx, 94. carbolic, 92. Premises, disinfection of, 68, 92, 94. Privies, disinfection of, 71. Privy-sinks, 42, 102. Privy-vaults, construction of, 22, 34, 35. contents of, 12. dangers of, 22. Pumpelly, 46. Purification of water, 87, 90. Putty-joints, 52, 54. Rat-holes in pipes, 59. Refrigerator wastes, 32. Respiration, organic matter of, 9.