Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 106
tion of the ship at sea, the sextant is held in both hands firmly,and the horizon which is sighted through the telescope is broughtinto view through the clear part of the horizon glass E. The arm C, carrying the index mirror D, is now moved overthe scale A until the light from the Sun just as it… … Fig. 99.—Sextant in Use. Shooting TnE Sun. the horizon. This forms an angle of the two beams of lightjust as an angle is formed of the two sticks of wood in the pailexperiment and the number of degrees the end of the arm Cpoints to on the scale B is the latitude in degrees or the distanceof the…
Astronomy · Stars
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