Farmers of Forty Centuries much of Japanese life that

much of Japanese life that had been sealed off from the rest of the world for centuries was now revealed to the public at large — including the artistic styles and subjects depicted in this excellent collection

David Erdman added much new material that came to light after the original publication of the book in 1954

tiny changes

and a full discussion of the vector operator "nabla" proceeds to a treatment of potential theory and Laplace's equation

and originality have their attraction for the adult mind as well

Farmers of Forty Centuries much of Japanese life thatFor more than 40,000 years, Asian farmers worked the same fields repeatedly without sapping the land's fertility and without applying artificial fertilizer! How they accomplished this miraculous feat is described by author Franklin Hiram King, a former official of the U. S. Department of Agriculture. King traveled to Asia in the early 1900s to learn how farmers in China, Korea, and Japan were able to achieve successful harvests century after century