Massachusetts State Board of Health. Geological Survey of New Jersey. Metropolitan Water-Works, Boston and vicinity. U. S. Geological Survey. Transactions American Society of Civil Engineers. Vols. 3, 15, 24, 32, 34 and 35. Proceedings of the Institution of Civil Engineers. Vols. 59, 62, 65, 66, 71, 73, 74, 76, 80, 115 and 132. Engineering News. Vols. 19 to 46. Engineering Record. Vols. 23 to 46. Journal of the Association Engineering Societies. Vol. 13. INDEX. Analyses, soil, Tabeaud Dam, 25 Analyses of soils, 14 Tabeaud Dam, 25 Borings, wash drill, Wachusett Dam, 48 Catchment area, 3 Clay for puddle, 15 Contractors’ outfit, Tabeaud Dam, 31 Core wall, impervious diaphragm as substitute for, 62 necessity for, 44 (See puddle.) Dam, Ashti, India, 35 Bog Brook, 41 Bohio, Panama Canal, 54 Croton Valley, slope of saturation in, 40 different types of earth, 33 Druid Lake, Baltimore, 52 high earth, statistical table of, 67 hydraulic-fill, 61 hydraulic-fill, San Leandro, 60 ideal profile of, 42 Isthmian Canal Commission, 54 Lake Frances hydraulic-fill, 61 New Croton, 39 graphical study of original earth portion of, 43 New England, typical section of, 40 new types of, 54 North Dike, Wachusett Reservoir, 48 rock-fill and earth combined, upper Pecos River, 58 safe height of, 39 San Leandro, 58 site location, 7 Tabeaud, 13, 17 Titicus, 41 Upper Pecos River rock-fill and earth, 58 with puddle core wall or face, 33 Yarrow, Liverpool water-works, 9, 33 Diaphragms impervious for earth dams, 62, 65 Dike, north of Wachusett Reservoir (see Dam; also reservoir) Drainage and slips of earthwork, 45 of dam sites, 63 Drains, bed rock, Tabeaud Dam, 19 Earthwork slips and drainage, 45 Embankment, Ashti, India, 35 Embankments, Jerome Park Reservoir, 45, 46 Factor of safety for dams, 64 Filtration, experiments on nitration through soils at Wachusett Reservoir, 50 formula, Hazen’s, 56 Foundations, 9, 63 Gravel for puddle, 15 Infiltration and percolation, 38 Isthmian Canal Commission, designs of dams for, 54 Outlet pipes and tunnels, 6 Percolation, 38, 57 Profile, ideal for dams, 42 Puddle, 14 core wall, Ashti Dam, 35 or face, 33 trench, 37 wall, Druid Lake Dam, 53 for Yarrow Dam, 34 vs. puddle face, 37 Reservoir basin, 37 outlets, 6 Wachusett, 48 Rollers for dams, 30, 65