" North China includes the densely populated and intensively cultivated North China Plain, the loess-covered uplands of Shansi, northern Shensi, and eastern Kansu, and the sparsely populated, semiarid steppes of Inner Mongolia....

"South China comprises the drainage basins of the middle and lower Yangtze River, the basin of the His Chiang (West River) in Kwangtung and Kwangsi; and the mountainous coastal provinces of Fukien and Chekiang. The division between the...

A map from 1907 of the United States showing the principal manufacturing areas in 1900. The star symbol in Ohio represents the mean center of manufacturing in the nation. Each symbol represents gross $25,000,000 or fraction more than...

A map from 1920 of the United States showing the principal manufacturing areas in 1900. The star symbol in Ohio represents the mean center of manufacturing in the nation. Each symbol represents gross $25,000,000 or fraction more than...