Image: Winnowing machine and tilt hammer

Description: A Han-dynasty (202 BC – 220 AD) era Chinese pottery model of two men operating a winnowing machine with a crank handle and a tilt hammer used to pound grain.
Title: Winnowing machine and tilt hammer
Credit: Gary Lee Todd's site, Henan Provincial Museum
Author: Gary Lee Todd
Permission: Professor Gary Lee Todd (Professor of History, Sias International University, Xinzheng, Henan, China) authorises the use of the pictures by him published on the website http://www.garyleetodd.com as well as http://picasaweb.google.com/GaryLeeTodd/ and http://picasaweb.google.com/leefoxx1949/ under the licence GFDL 1.3 and CC-by-sa-all. See also the category Photographs by Gary Lee Todd.   This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page. Wikimedia has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by an OTRS member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2008102110031143. If you have questions about the archived correspondence, please use the OTRS noticeboard. Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2008102110031143
Usage Terms: GNU Free Documentation License
License: GFDL
License Link: http://www.gnu.org/copyleft/fdl.html
Attribution Required?: Yes