Principal Aqueducts constructed by the Ancient Romans in other parts of Europe, 18 Aqueducts of Modern Rome, 28 Principal Modern Aqueducts of Italy, France, etc., 30 Aqueducts of Mexico and the adjacent States, 37 Aqueducts of South America, 40 Fountains, 47 * * * * * History of the Progressive Measures for Supplying the City of New-York with Water, 57 Of Plans Proposed for furnishing the City with Water and of the Plan adopted, 69 Sources of the Croton River, 75 Flow of Water in the Croton River, Capacity of the Fountain Reservoir, &c., 76 General Design of the Channel-way and Reservoirs, 78 General Construction of the Aqueduct, 81 Description of the Line of Aqueduct, 95 Appendix, 125 * * * * * PLATES. Aqueduct of Spoleto, Italy, 32 Sections of the Croton Aqueduct, 84 & 86 Entrance Ventilator, 88 Isometrical View of Culvert, 90 Tunnel and Gate Chamber at the head of the Aqueduct, 92 View above the Croton Dam, 95 Entablature over the entrance to the Aqueduct, 96 View below the Croton Dam, 98 Croton Aqueduct at Sing-Sing, 101 Aqueduct Bridge at Sing-Sing, 102 Aqueduct Bridge for Road-way, 103 Croton Aqueduct at Mill-River, 104 Croton Aqueduct at Jewell’s Brook, 105 Croton Aqueduct at Hastings, 106 Croton Aqueduct at Yonkers, 108 Croton Aqueduct at Harlem River, 110 View of the Jet at Harlem River, 112 Croton Aqueduct at Clendinning Valley, 113 Aqueduct Bridge at Clendinning Valley, 114 Plan of the Receiving Reservoir, 116 Isometrical View of the Distributing Reservoir, 119