﻿Plate 
  60. 
  — 
  Peruvian 
  whistling 
  jars. 
  Top: 
  Late 
  Chimu 
  style. 
  Bottom: 
  Actual 
  

   cross 
  section 
  and 
  diagrammatic 
  sketch 
  of 
  a 
  whistling 
  jar. 
  (Courtesy 
  American 
  

   Museum 
  of 
  Natural 
  History.) 
  

  

  