File:Hydraulic-Powdered Trip Hammers Chinese 001.jpg

Summary
A set of trip hammers on an axle rotated by a waterwheel, a machine used to decorticate grain. From the Tiangong Kaiwu encyclopedia of 1637, written by the Ming Dynasty encyclopedist Song Yingxing (1587-1666).

This picture appears on page 93 of E-tu Zen Sun and Shiou-Chuan Sun's translation (Pennsylvania State University Press, 1966)

Date: 6 August 2007 Source: Own work (My book) Author: PericlesofAthens - This image (or other media file) is in the public domain because its copyright has expired. This applies to Australia, the European Union and those countries with a copyright term of life of the author plus 70 years.