LIST OF ILLUSTRATIONS. 



Page. 



Irrigation five thousand years ago, ..... 2 



Irrigation scene on the river Nile, ..... 4 



(irecian tympanum wheel, ...... 8 



Dividing line between desert and orchard, .... i4 



Capillary tubes of soil, ....... 27 



The Jackson level, ........ 43 



Target, .... .... 44 



Drop and reduction box, ....... 48 



Curve of a large canal, ....... 49 



("anal on a hillside, ...... . 51 



Headgate of a canal, ..... . 52 



Top sectional view of Land's sand gate, .... ~4 



Side view of sand gate, .... . 54 



Front view of sand gate, ..... .54 



Automatic waste gate, ...... 56 



Iron outlet gate, ...... .58 



Hear Valley dam, ....... 69 



Sweetwater dam, ........ 71 



A diverting dam, ..'...... 73 



Cross section of hydraulic reservoir, ..... 79 



Riveted iron pipe, ....... 83 



Spiral iron pipe, ........ 84 



Vitrified pipe 8G 



Asbestine pipe machine, ....... 87 



Side view of stave pipe, ...... ss 



Cross section of stave pipe, . . . . . . s;t 



Stave pipe line in position, ...... :>o 



l?ox flume with waste gate, ...... 96 



Flumes across a valley, ...... 97 



Truss flume across a stream, ...... '.is 



Method of elevating a high-Hume trestle, ... 100 



Bench Hume for a large canal, ...... 102 



The great flume over the Pecos river, .... 105 



Side view of small iron Hume, ...... 104 



End view of small iron Hume, ..... 104 



Cross section of large iron flume. ..... 105 



Flume on a rocky ledge, ...... 106 



Flume with overhanging support, . . 106 



Divisor . . 116 



Foote's measuring flume, ....... 117 



Rectangular weir, . .... 118 



The current meter, . . . . . . . . 1'J'J 



Water register 123 



