History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c38.s1.t2.7
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c38.s1.t2.7
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v1.c38.s1.t2.7
The present value of the Equatorial circumference of the Earth = 24900 miles (Encyclopadia) = 4×10⁷ metres.