METROPOLITAN MUSEUM OF ART / SCIENCE PHOTO LIBRARY METROPOLITAN MUSEUM OF ART / SCIENCE PHOTO LIBRARY
Peacock water clock invention, 14th century. This device operated using water power. In the completed device, the arch containing two peacocks would be surmounted by another containing a peahen that would turn from right to left over the course of half an hour, causing the peacocks to whistle. Invention from a 1315 edition of 'Book of the Knowledge of Ingenious Mechanical Devices' by Islamic scholar Ismail al-Jazari.
Model release not required. Property release not required.