Yantras or Mechanical Contrivances in Ancient India c2.48

c2.48

*Sarvatobhadra*: According to the commentary of Bhaṭṭasvāmin⁹, this is a sharp-edged wheel that is placed on a wall and rotated so as to fling big stones all around; according to others, it is also called *Siddhabhūmirika-yantra* and scatters small stones.