QUANTITY OF SEWAGE
17. Dry Weather Flow. 18. Methods for Predicting Population.
19. Extent of Prediction. 20. Sources of Information on
Population. 21. Density of Population. 22. Changes in Area.
23. Relation between Population and Sewage Flow. 24.
Character of District. 25. Fluctuations in Rate of Sewage
Flow. 26. Effect of Ground Water. 27. Résumé of Method for
Determination of Quantity of Dry weather Sewage. QUANTITY OF
STORM WATER. 28. The Rational Method. 29. Rate of Rainfall.
30. Time of Concentration. 31. Character of Surface. 32.
Empirical Formulas. 33. Extent and Intensity of Storms. 24–50