INDEX 



PAGE 



Advantages of Irrigation 13 



Fertilizing effects 15 



Scientific principles 16 



Value of irrigated lands — 20 



Alfalfa 324 



Disease of 346 



Dodder 347 



Feeding value 345 



Fertilizing elements 342 



Harvesting 336 



History of 324 



Hoove or bloat 349 



Irrigating 334 



Nurse crops 331 



Preparing land 328 



Rotation 343 



Soils for 327 



Seed crop 340 



Seeding 329 



Stacking 337 



Straw sandwich 350 



Turkestan variety 326 



Ventilating stacks 340 



Alkali— Chemical antidotes... 44 



Composition of 36 



Crops to neutralize 44 



Effect on plants 38 



Formation of salts 37 



Remedies for 40 



Waters carrying 39 



Asbestine Sytem 116 



Canal Construction— Cement- 

 ing 80 



Curves and friction 68 



Cost of 62-65 



Ditching methods 61 



Drop-head 72 



Dropping the grade 67 



Evaporation and seepage. . . 79 

 Form and capacity 65 



PAGE 



Canal Construction— Conrd. 



Grades and slopes 66 



Headgates 70 



Laterals 81 



Laying out ditches 58 



Locating by surveys 59 



Ratio of slopes 68 



Sand gates 74 



Surveying outfit 58 



Tail races 75 



Waste gates 75 



Cisterns, Capacity of 165 



Dams 96 



Drouth, Loss by 458 



Duty and Measurement of 



Water 140 



Capacity of canals 148 



Capacity of cisterns 165 



Capacity of windmills 164 



Cubic foot 141 



Current meters 156 



Divisors 149 



Evaporation 146 



Floats 156 



Gauging rivers 155-165 



Hour system 146 



Irrigation head 143 



Miner's inch 142, 149 



Modules or boxes 150 



Stokes measuring gate 159 



Under humid conditions 466 



Units of calculation 141 



Water registers 158 



Weirs 152, 162 



Electricity— Cost of a plant. . . 454 

 Generating by turbines. .448-450 



Joint use 454 



Induction motors 451 



Installing a plant 451 



Operating pumps 451 



491 



