Yantras or Mechanical Contrivances in Ancient India c2.76
Yantras or Mechanical Contrivances in Ancient India c2.76
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c2.76
¹² Cf. Roger Bacon (latter part of the 13th century A.D.) in his *Epistolo de secretis operibus*: "Also cars can be made so that without animals they will move with unbelievable rapidity; such we opine were the scythe-bearing chariots with which men of old fought." (THORNDIKE, *op. cit.*, Vol. II, p. 654.)