PLATE 4. 



See Cuaptek V. 

 Maps Representing the Historical Changes in the Course of the Yellow River, or Hivang Ro. 



Map I. Lower course of the Yellow river from the time of Yu clown to B. C. 602. Also the 

 ancient mouths of the Yangtse Kiang. 



Map II. Course after the first great change during the Chow dynasty (B. C. 602). 



Map III, Course during the third century, B. C. 



Map IV. Course resulting from changes about 132 B. C. 



Map V. Second great change about 11 B. C. 



Map VI. The channels as they existed during the Tang and five succeeding dynasties, from A. D. 

 70 to A. D. 1048. 



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