﻿Smithsonian 
  Report 
  1922. 
  — 
  Newell 
  

  

  Plate 
  6. 
  

  

  1. 
  Irrigating 
  Canal 
  in 
  Reinforced 
  Concrete 
  Flume. 
  

  

  2. 
  Water 
  in 
  Irrigating 
  Canal 
  Conducted 
  Across 
  Depression 
  by 
  

   Inverted 
  Siphon. 
  

  

  