Alberuni's India. An account of the religion, philosophy, literature, geography, chronology, astronomy, customs, laws and astrology of India about A.D. 1030 (1910)
Biruni, Muhammad ibn Ahmad, 973?-1048, Sachau, Eduard, 1845-1930 · London : K. Paul, Trench, Trübner & Co., ltd. · leaf 329
posethe following calculation :— Let A B round the centre H represent the globe ofthe earth. B is tbe standiug-point of the observer; hisstature is B C. Further, wedraw the line C A, so that ittouches the earth. Now it is evident that thefield of vision is B A, whichwe suppose to be equal toJg- of… … CHAPTER XXVI. 275 HT, i.e. 3431. So we get as quotient T C = o° 1445;and B C, the stature of the observer, is 0° 7 45. Our calculation is based on this, that H B, the sinustoius, is 3438. However, the radius of the earth is,according to the circumference which we have men-tioned, 795° 27 16…
Hindus · Astrology · Chronology, Hindu
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