History of Dharmashastra (Ancient and Mediaeval Religious and Civil Law in India) v5.c72.522

v5.c72.522

Viṣṇu Dh S 23. 46 provides⁷³³ that the purification of small reservoirs of water that are static (i. e. from which no streams flow down) is made in the same way as that of wells (without steps), while in the case of large reservoirs no pollution is recognised. It is declared that waters are purified by the rays of the sun and the moon and the contact of the wind and by cowdung and the urine of cows; some of these ideas are supported by modern scientific discoveries.