Caption from Harrison Forman's book Changing China. London News photo caption: Showing the form of the wooden scoops that carry up water to the conduit at the top: detail of one of the gigantic water-wheels at Lanchow [Lanzhou].
Source of Descriptive Information
The Illustrated London News. (December 22, 1934). On ""China's Sorrow"": Giant Wooden Water - Wheels at Lanchow [Lanzhou] - Picturesque Irrigation Machinery on the Yellow River.
Forman, H. (1948). Changing China. New York: Crown Publishers