books.google.com - Dr Needham's fourth volume traces the development of physics and physical technology in ancient and medieval China. It is conveniently divided into three separate parts, the present volume, IV:1, dealing with physics as such, IV:2 with mechanical engineering and IV:3 with civil engineering and nauti...http://books.google.com/books/about/Physics_and_Physical_Technology.html?id=oJ9nayZZ2oEC&utm_source=gb-gplus-sharePhysics and Physical Technology
