Chapter III

25. The Roman Water-supply 37
26. The Roman Aqueducts 38
27. Anio Vetus 39
28. Tepula 40
29. Virgo 40
30. Alsietina 40
31. Claudia 41
32. Anio Novus 42
33. Lengths and Dates of Aqueducts 42
34. Intakes and Settling-basins 43
35. Delivery-tanks 44
36. Leakage and Lining of Aqueducts 44
37. Grade of Aqueduct Channels 45
38. Qualities of Roman Waters 46
39. Combined Aqueducts 46
40. Property Rights in Roman Waters 46
41. Ajutages and Unit of Measurement 47
42. The Stealing of Water 49
43. Aqueduct Alignment and Design of Siphons 49

CHAPTER IV.
44. Antiquity of Masonry Aqueducts 52
45. Pont du Gard 52
46. Aqueducts at Segovia, Metz, and other Places 53
47. Tunnels 54
48. Ostia, the Harbor of Rome 56
49. Harbors of Claudius and Trajan 58