228 INDEX. 



PAGE 



Peat i8 



Plat of a survey 63 



Platting a survey from field-notes 96 



compass bearings , 97 



Plow, use of, in draining 113, 212 



Prices of drain-tile 210 



Profile, how made 78 



locating grades on , 78 



use of 78 



Profi;ts, estimated 213 



of drainage , 221 



Quantity of water, formula for., 130 



, to be removed by drains 133 



Rainfall, provision for unusual 145 



Record of work 64 



Residence grounds, drainage of , 184 



Road drainage, essential elements of 188 



importance of 187 



Road inquiry, office of 187 



Roads, brick-paved 197 



gravel and earth.. 199 



surface, ditches for i88 



form of X91 



Rod, speaking, description of. 54 



target 53 



use of 53 



Roof-water 179 



Roots in drains 185 



Saturation, line of, between drains 39 



plane of. .... , 38 



Seepage, drain for , 192 



Sewer-pipe for culverts. 193 



how laid. ..*......... ..,....,,,, 194 



Side ditch, discharge of . . . . 176 



Dignts, lengtn oi« •.*..•..••»•............ •»...• .•.•.«.•..•«, 74* 



Silt-basin, eflfect upon flow ....,, 118 



use of. 118 



