SECT. 2.] 



TO POSITION IN SPACE. 



73 



63. 



For an example, we continue further the calculation carried to the helio 

 centric place in article 51. Let the heliocentric longitude of the earth, 

 2419 49&quot;.05 = j&, and log R = 9.9980979, correspond to that place; we put 

 the latitude =0. We have, therefore, Jl L = 17 24 20&quot;.07, log R = R, 

 and thus, according to method IL, 



log tan b . . . 9.0474879 n 

 l = 621 55&quot;.07 



log// 0.0824139 



According to method IH., from log tan = 9.6729813, we have f = 25 13 6*31, 

 and thus, 



log tan (45 -f Q . . . 0.4441091 



logtani(X L) . . . 9.1848938 



log tan (^ H 4X) . 9.6290029 n 



l-n kL = - 23 3 16&quot;.79 I when ce/=352 34 22 / .225. 



U+*X== 153739.015J 



64. 



We further add the following remarks concerning the problem of article 62. 

 I. By putting, in the second equation there given, 



N=l, N=L, N=l, 

 10 



