﻿Smithsonian 
  Report, 
  1943. 
  — 
  Cooper 
  

  

  Plate 
  2 
  

  

  

  Food. 
  

  

  Upper, 
  Wapisiana 
  women 
  of 
  British 
  Guiana 
  grating 
  cassava 
  (Manihot 
  utilissima) 
  root, 
  preparatory 
  to 
  

   squeezing 
  out 
  the 
  juice 
  which 
  contains 
  poisonous 
  hydrocyanic 
  acid. 
  (Courtesy 
  The 
  University 
  Museum,. 
  

   Philadelphia, 
  Pa.) 
  

  

  Lower, 
  Aymara 
  gardening 
  terraces 
  at 
  Ichu, 
  Peru, 
  in 
  sierral 
  territory. 
  (Courtesy 
  Alfred 
  Kidder 
  II.) 
  

  

  