History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t5.6
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t5.6
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v1.c13.s2.t5.6
(c) The cooling action of the air draft in the bottom chamber.