CHINA - SEPTEMBER 04: Engraving by J Pass showing Chinese men on a treadmill which turns a waterwheel to irrigate the land. The water is lifted in bamboo tubes. Artistic license has been enthusiastically employed to depict one of the men smoking opium. Illustration from �Encyclopaedia Londinensis, or, Universal Dictionary of Arts, Sciences, and Literature� published in London, 1810-1829. (Photo by SSPL/Getty Images)
