Historical Photographs of China reference for this set: Nh09. Tien - Tien Yuan Electro-Chemical Works, Ltd 天原電化工廠股份有限公司, 重慶市江北區貓兒石.

The industrial-chemical Research Department at the Tien Yuan Electro-Chemical Works, Ltd. (Tian yuan dian hua gong chang gu fen you xian gong si 天原電化工廠股份有限公司), Chungking (Chongqing) 重慶

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