Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 68
ne the azimuths of anumber of lines of the triangulation instead of a single one (in orderto lessen the effect of errors of observation). 89. The Length of a Degree of Latitude. — The geodetic andastronomical observations thus give the length of the line Ah,both in feet and in degrees, so that we… … Fig. 18. § 89] THE ELLIPTICITY OP THE EARTH. 55 earths diameter would be found simply by multiplying thelength, of one degree by 360 and dividing the product by it,that is, 3.1415926. More than twenty such arcs have been measured in differ-ent parts of the world, varying in length from 48° to 2°,…
Astronomy · Constellations
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