Yantras or Mechanical Contrivances in Ancient India c2.173

c2.173

1. Five storeys could be arranged and the bed placed on the ground floor made to go up to each higher floor at the end of each watch of the night. (65).
2. Another pleasure-contrivance is the couch called *Kṣīrābdhiśayana*, in which the serpent-like bed goes up and down by the soft action of air, like that of the serpent's breathing. (68-69).