The first known rainfall records were kept by the Ancient Greeks, about 500 B.C.[citation needed] About 400 B.C. people in India also began to record rainfall.[1] The readings were correlated against expected growth, and used as a basis for land taxes. In the Arthashastra, used for example in Magadha, precise standards were set as to grain production. Each of the state storehouses were equipped with a rain gauge to classify land for taxation purposes.[2]
In 1441, the Cheugugi was invented during the reign of King Sejong the Great of the Joseon Dynasty in Korea as the first standardized rain gauge.[3][4][5] In 1662, Christopher Wren created the first tipping-bucket rain gauge in Britain in collaboration with Robert Hooke.[3] Hooke also designed a manual gauge with a funnel that made measurements throughout 1695.