Historical Photographs of China reference for this set: Nh01. Szechuan (Sichuan) Province 四川省.
A pedal-driven square-pallet chain pump, Szechuan
Photographs from the collection may be reproduced only with written permission. For permissions, contact the Librarian, East Asian History of Science Library, Needham Research Institute. Further information about the library and the ‘Joseph Needham Photographs – Wartime China, 1943-1946’: http://www.nri.cam.ac.uk/JN_wartime_photos/home.htm