A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 215
b ; U. L. upper limb. Observed Alt. H. P. Height ofthe eye. Ans.True Alt. 1. D L.L. 53° 23 58 14 14 feet 54° 10 nearly 2. D L.L. 48° 58 60 27 19 49° 48 « 3. D U.L. 57° 11 54 30 20 57° 19 t 4. D L.L. 63° 38 55 29 12 64° 14 5. D U.L. 20° 3 54 14 16 20° 32 6. D L.L. 16° 2 59 38 23 17° 12 When the… … the principle on which this method is founded ; it is the applicationof spherical trigonometry. Let Ph be the earths axis, Qqthe equator. Suppose the sun to bethe object, and let its position be Sand T at two different times. The elapsed time measures theangle SPT. In the triangle PTS,we have the…
Surveying · Navigation
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