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Eccentricity of the Sextant by Frederic Furbish, 1893

Eccentricity of the Sextant by Frederic Furbish, 1893, Page 167

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Fundamental Equations of Condition. (51) x + 0.20926y + 0.61215z - 0.7272737 = 0 (52) x + 1.37329y + 0.92772z - 0.7271272 = 0 (53) x + 0.45641y + 0.83935z - 0.7269569 = 0 (54) (55) x + 0.49801y + 0.86487z - 0.7273402 = 0 (56) x + 1.20923y + 0.61212z - 0.7273129 = 0 (57) x + 1.37329y + 0.92772z - 0.7271320 = 0 (58) x + 0.23857y + 0.64825z - 0.7270415 = 0 (59) x + 1.14224y + 0.98983z - 0.7272376 = 0 (60) x + 0.45638y + 0.83934z - 0.7269831 = 0 Now letting x = x' + 0.7269000 , in order to reduce the absolute terms to numbers of four figures or less; letting y = (1/3)y' in order to make the coefficients B less than [ninety? or unity?]; and cutting the coefficients B and C down to four places, as may be done since y and z are both small; we have, -
 
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