Samples, bacterial, 93. bottles, 1. chemical, 1. interval before analysis of, 2. quantity required, 1. representative, 3. sludge and mud, 73. Sewage sludge, analysis, 73. Silica, determination of, 56. Soda ash, analysis of, 82. Soap method (hardness), 31. Sodium and potassium, 58. Solids, total, fixed, volatile, 29. Specific gravity of sludge and mud, 74. Stability, relative, of effluents, 69. method, relative, 71. Standards, ammonia, 17. chlorine, 65. color, 9. hardness, 32. iron, 45. Nessler, color, 10. platinum-cobalt, 10. turbidity, 4. Sterilization of media, 95. Storage of samples, 2, 98. Sugars for media, 94. Sugar broths, 95. Sulfate, K and Na, 58. Suspended matter, 30. T. Tin, determination of, 54, 55. Tintometer, Lovibond, 11. Titration of media, 94. Total nitrogen, 25. residue on evaporation, 29. Tryptophane broth, 107. Turbidity, 4. coefficient of fineness, 8. platinum wire method, 5. rod, graduation, 6. standard, 4. turbidimetric method, 7. turbidometer, graduation, 8. V. Voges-Proskauer test, 107. Volatile matter, 29. in sludge and mud, 74. Z. Zinc, 52. ------------------------------------------------------------------------ TRANSCRIBER’S NOTES 1. Silently corrected typographical errors and variations in spelling. 2. Archaic, non-standard, and uncertain spellings retained as printed. 3. The Chemical Bibliography was reformatted in footnote style. 4. The Bacteriological Bibliography was reformatted in footnote style and the numbering was increased by 200. 5. Enclosed italics font in _underscores_. End of the Project Gutenberg EBook of Standard methods for the examination of water and sewage, by American Public Health Association