Yantras or Mechanical Contrivances in Ancient India c2.188

c2.188

2. The next is actually noted as a bedroom accessory. In the hollow of the bird above mentioned is placed a small drum-like piece in halves and with an air-passage as in the previous yantra; the interior device is to be loosely hung and as the bird oscillates, a highly pleasing sound is created which reduces the anger of the ladies who are cross. (91-92).