Smithsonian Report, 1921. — Hitchcock. 



Plate 4. 



I. Numerous Graves in a Field in the Yangste Valley. In Foreground 

 Are Mulberry Bushes Used as Food for Silkworms. 



2. A Valley Scene in the City of Nanking. The Valleys Are Intensively 

 Cultivated while the Hills are Grass Covered. 



380—4 



