Colbert, E[lias] [from old catalog] · Chicago, G. & C. W. Sherwood · leaf 115
proportional dis-tance of Venus from the Sun; the complement ofthis, or 0.2766683, is her proportional distancefrom the Earth at the time of Inferior Conjunction. A S TEON 0 MY. If, now, at the time of a transit of Venus overthe Suns disc (Sec. 163), observations be simul-taneously taken at two… … known, andthat portionwhich liesbetween Dand F isfound bysubstract-ing there-from thesum of theob served distances, X F and D M; the remainder, F D,when increased in proportion as C is nearer thanA is to S, is the measure of the angle at C. Theright line joining A and B is measurable, its…
Astronomy · Stars
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