1836.] Three Points in Surveying, 325 



cosee 7T = 22° 3'0 = 0,417160 



6= 2. = 0,301030 



0,718190 



sin y == 94° 8' 24" = 9,998365 

 DC == 0,717055 



For the last method, suppose the value of x has been taken = 105* 

 9' then (R — x) == 94° 7' 21" 



0,732382 



sin P 



sin x = 105° 9' = 9,984637 



L = 0,717019 



b = 0,718190 

 sin 7r 



sin (R — x) = 94° 7' 21" = 9,998875 



X 0,717065 



the difference or L ~ X = 46 and the tabular difference of the 

 sin 105° 9" == 57 = D 



sin 94° 7' — 15 = h and because both the 

 angles x and y are greater than 90° the sum of these difference 

 is to be taken on 57 + 15 = 72 



and^- i^ I 63" 

 D + 8 — 72 



which being deducted from a? gives it equal 105° 7' 57' and (R—x) 

 equal 98° 8' 24" as before found. 



and ~ 0" - .57 x 63 = 36 

 L =0.717019 



DC = 0.717055 



and JL <p>i = .15 x 63" = 9 

 X = 0.717065 



DC = 0.717053 



as found before. 



