Yantras or Mechanical Contrivances in Ancient India c2.217
Yantras or Mechanical Contrivances in Ancient India c2.217
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c2.217
³⁷ Cf. Roger Bacon, *op. cit.*:—"Also flying machines can be constructed so that a man sits in the midst of the machine revolving some engine by which artificial wings are made to beat the air like a flying bird...." (THORNDIKE, *op. cit.*, Vol. II, pp. 654-5).