More information is known about the looms used. The Nung Sang Chi Yao, or Fundamentals of Agriculture and Sericulture, compiled around 1210, is rich with pictures and descriptions, many pertaining to silk.[32] It repeatedly claims the Chinese looms to be far superior to all others. It speaks of two types of loom that leave the worker's arms free: the draw loom, which is of Eurasian origin, and the pedal loom which is attributed to East Asian origins.