Muslim engineers used norias to discharge water into aqueducts which carried the water to towns and fields. The norias of Hama, for example, were in diameter and are still used in modern times (although currently only serving aesthetic purposes). The largest wheel has 120 water collection compartments and could raise more than 95 litres of water per minute. In the 10th century, Muhammad ibn Zakariya al-Razi's "Al-Hawi" describes a noria in Iraq that could lift as much as 153,000 litres per hour, or 2550 litres per minute. This is comparable to the output of modern norias in East Asia, which can lift up to 288,000 litres per hour, or 4800 litres per minute.