" tiles; 201-205, 381

Count Rumford; 272, 273, 287

_Country Gentleman_; 16, 198, 329

Crisp, Thomas; 203

Custis, G. W. P.; 18

Dams; 333, 347

Deanston system; 37

Delafield; 46, 76, 168

Denton, J. Bailey; 21, 161
" Letter from; 200

Depth of drains; 164-173, 326, 328, 377

Directions how to lay drains; 252-258

Dew, cause of; 305
" increased by drainage; 284, 306
" imparts warmth; 307

Dew-point; 65, 66, 306

Dickinson, A. B.; 108

Direction of drains; 146-155

Distance " ; 155-164, 377

Ditch diggers; 247-251

Drainage acts; 349
" companies; 333
" effects of; 258-276
" methods of; 99-120
" water of; 60, 61, 339

Drainage, will it pay? 95

Drain bricks; 121, 144

Drains of brush; 104
" larch tubes; 111
" plug; 106
" of poles; 113
" rails; 112
" stones; 114-119
" wedge; 110
" run before rain; 269, 270

Drought, drains prevent; 281-286, 300

Dry Wells; 197, 198

Durability of drains; 141-145

Elkington's system; 27, 33, 240, 365

Embankment; 18

Emerson, R. W.; 15, 23

Engineering; 163, 213

England; 19, 340
" wet land in; 89

English tools; 243

Evaporation; 48, 61, 62, 293-297
" cold from; 63, 272, 293-297
" from land; 62, 69, 72
" " water; 62, 69, 73

Excavation; 165
" cost of; 165, 201, 214
" table of; 216

Experiments, American; 367, 376

Factory reservoirs; 341-343

Fall in drains; 174, 378

Fences; 211, 346

Filtration; 41, 60, 61

Filtration tables of; 70, 71

Fitzherbert; 23

Flat-bottomed tiles; 129

Flowage, effects of; 333, 341, 343, 346

Flushing drains; 186

Freezing out; 75, 262
" of pipes; 171

French's plan; 373

Friction of water; 131, 133

Frost; 67, 143, 170, 172, 297, 299

Fruit trees; 298, 374

Furrows; 195

Gauge; 246

Germination; 276-281

Gillis, Lieut.; 65

Gisborne; 122, 126

Gravitation; 131

Grading drains; 233

Gratings at outlets; 183

Great Britain; 89
" wet lands in; 89

Greeley, Horace; 88

Haarlaem, Lake; 19

Headers; 153, 154

Heat in wet land; 288-290
" water; 272, 273

Hobbs, Doctor; 51, 54, 56

Holyoke, Doctor; 62

Horse-shoe tiles; 124

Implements; 225, 252

Indications of moisture; 93

Injury by drainage; 308, 313

Ireland, drainage in; 376

Irrigation; 14