it costs, 150
Draining, will it pay? 161
Draining, when necessary, 7
Drains, Cubic yards of excavation in, 155
Drains, and drained land, care of, 144
Drains, lateral, should be parallel, 99
Drains, how they act, 21
Drains, obstructed, how cleared, 146
Drains, old, how formed, 146
Drains, rate of fall, 90
Drains, their action in the Central Park, 86
Drained Soil, capacity for receiving water of rains, 23
Drainage of dwelling houses, 232
Drought, 37-40

Economy versus cheapness, 152
Engineering and Superintendence, cost of, 153
Engineers, draining, 47
Epidemic at Maplewood Young Ladies' Institute, 232
Epidemics caused by cess-pools, 237
Epidemics caused by ordure beneath houses, 238
Evaporation, 33
Evaporation, amount of, 34
Evaporation, effect on temperature, 33-35
Evaporation, heat lost during, 34

Fall, rate of in drains, 77
Fallacies in draining, 62
Fen-lands of England, 193
Fever and Ague, 208
Fever and Ague, exact cause unknown, 210
Filtration and absorption, 26-39
Filling, illustration of--ditch with, furrows, 141
Filling, maul for ramming, (illustration), 138
Filling, scraper for, (illustration), 140
Filling, the ditches, 136
Finishing tools, (illustration), 123
Finishing scoop, 123
Finishing scoop, how used, 126
Foot-pick, (illustration), 156
Four-foot drains, 70

Germination of seeds, 13
Gisborne, Thos., quotations from, 28-31-35-47-66-78-84-93-127
Grading, 124
Grading, cost of, 156
Grade stakes, 103
Grades, computation for, 109
Grades, how to establish, 107
Gratings in Silt-basins, 148

Hackensack meadows, 203
Hay, 168
Heat, amount of lost during evaporation, 34
House drainage, 220
House drainage, back drain system, 235
House drainage bad, indicated by offensive smells, 239

Indications of the need of draining, 9
Injury from standing water in the subsoil, 15
Impervious soil, 31

John Johnson, 164

Land requiring draining, 7
Lateral drains, 61-97
Lateral drains, direction of, 75
Lateral drains, shallow, how connected with deep main, 111
La Roche, quotations from, 213
Levels, how to take for drains, 104
Leve