Examines the mechanisms of time measuring devices that regulate by the consistent flow of water in or out of the device, a technique employed from the most ancient Egyptian and Babylonian times but reaching its apogee during the Medieval Islamic period where the principles of Archimedes instructions are replicated and enhanced.  The author draws almost exclusively on a C16th Arabic manuscript title Kitāb Arshimīdas fī ‘amal al-binkamāt, many of whose pages and diagrams are reproduced here.  Paperback.  46 pages.  Very good condition.  Cat No 4779