INDEX 



255 



Stretching the boning line, 140. 

 Sump to gather water, 198. 

 Surface tension, 26 ; illustrated, 



27. 

 Surface water, to remove excess of, 



157, 158. 



T's, 114, 150. 



Table for hose-level data, 176. 



Table of plant-food element, 3. 



Target, 97 ; reading, 100. 



Temperature, affected by drainage, 

 214 ; affects germination, 

 6 ; affects rest period of 

 soil, 11 ; affects root ac- 

 tion, 10 ; changing, 208 ; 

 tables, 212, 213 ; desirable 

 temperature conditions, 

 8; effects illustrated, 8; 

 effect of bad structure on, 

 51, 52; effect of gravita- 

 tional water on, 51 ; maxi- 

 mum for germination, 6 ; 

 minimum for germina- 

 tion, 6 ; not same for all 

 seeds, 6 ; optimum for 

 germination, 6. 



Thermal movements, 28 ; direction 

 of, 28. 



Tile, 71; blinding, 142; cement, 

 72 ; clay, 71 ; clogging by 

 roots, 142 ; cost of haul- 

 ing, 162 ; durability of, 

 72 ; estimating and order- 

 ing, 114; fitting the joint, 

 146 ; glazed, 71 ; hauling 

 and distributing, 1 14 ; 

 how water approaches, 84 ; 

 how water enters, 75 ; laid 

 deeper in muck soils, 185 ; 

 laterals, 76 ; laying, 141 ; 

 mains, 76 ; making close 

 joints, 141, 142 ; relation 

 of diameter to capacity, 

 85 ; size to use, 84 ; sub- 

 mains, 76 ; systems, 76 ; 

 use only sound, 75. 



Tile drainage, 71 ; in England, 192. 



Tile hook, 134. 



Tile scoop, 134. 



Tiling springy places, 156 ; boggy 

 places, 156. 



Time a factor in proceedings in 

 organizing a drainage dis- 

 trict, 222. 



Top connection of lateral to main, 

 147. 



Tractor ditchers, 136. 



Trap for outlet, 146. 



Trial depths, 128. 



Tubingen, 13. 



Underground dike, 198. 



Underground outlets, 152 ; ex- 

 tent of area drained by, 

 153. 



Uniform grade or fall, 89. 



Unlawful acts in matters of drain- 

 age, 223; penalties, 223; 

 punishment, 224. 



Using data, 133. 



Using line for opening ditch, 138. 



Using the boning line, 140. 



Using the level, 98 ; cheaper levels, 

 104, 119. 



Van Tiegham, 6. 



Vertical systems of drainage, 153. 



Waring, Geo. E., Jr., 80. 



Warrington, Robert, 7. 



Waste lands, 68. 



Water, conditions of, 24. 



Capillary, 25 (see capillary 



water). 



Gravitational, 24 (see gravita- 

 tional water). 

 Hygroscopic, 25 ; amounts, 25 ; 



agricultural value, 25. 

 Surface, 25. 



Water, dissolves and carries food, 

 10, 22, 23 ; how it enters 

 tile, 75 ; influences ger- 

 mination, 22 ; in biologi- 

 cal activities, 21 ; in food 

 preparation, 21, in physi- 

 cal and chemical changes, 

 21 ; how it enters the 

 plant, 10 ; losses by evap- 

 oration, 50 ; service of 



