A new treatise on astronomy, and the use of globes : in two parts ... (1866)
M'Intire, James, 1799-1879 · New York : Published by A.S. Barnes & Burr ... · leaf 174
and I, may be found ? By using these ele QUANTITY OF A SOLAR ECHP3E. 167 obscuration, and the times of the beginning and end of theeclipse, may be calculated in the same manner as in the generaleclipse. 204. Quantity of a Solar Eclipsk at a ParticularPlace. In a partial eclipse, the number of… … Thus let m represent the moons centre at the time of great-est obscuration, then the digits contained in B D will expressthe quantity of the eclipse. Put B D = Q, and we have,D E : B D :: 12 : Q, or, Id : B D : : 12 : Q = ^ ^ ^ d ■ But B D = S D + B m - S m (202) = «? + rfQ (d ■\- d —I cos I) I…
Astronomy
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