these devices often need cooling water to maintain the necessary temperature differential. This is exactly where the new thermoelectric generator system comes in – and it’s rather ingenious.

Image caption, The Book of Ingenious Devices published in AD850. It is believed to be written by three brothers working at the House of Wisdom. Islamic astronomers improved the astrolabe which was ...

The Elephant Clock", Folio from a Book of the Knowledge of Ingenious Mechanical Devices by al-Jazari [57.51.23] This item is openly available as part of an Open ...