INDEX. 227 



PAGE 



Limitations of size of tile 141 



grade 141, 142 



length of drain 141, 142 



Line of saturation, variation of 40 



Lining grade-stakes , 72 



Locating drains, principles of 47 



lateral drains 48 



main drains 47 



open drains 150, 166 



Macadam 188 



Machines for digging tile ditches 119 



Mapping drainage 95 



Map, a sketch 95 



how to make , 98 



scale of 68 



the finished. , 95 



Meridian determined by equal shadows of the sun 82 



old lines Si 



Movement of ground-water 27, 40, 41 



Muck c 18 



Notes, form for *j6f 168 



how kept 74, y6 



on curves 154, 155 



Open channels, benefit of , 220 



Open ditches, capacity of 159 



depth of. 158 



form of 157 



grade for 150 



quantity of water to be removed by , 160 



velocity of flow in 152 



Orchards, drainage of * 184 



plan of drains for , 185 



Outlet, box protection for n6 



stone abutment for. 117 



Outlets, submerged iii 



Overflow, provision for 145 



Faved roads • 195 



