Himatava Mounrains, 333 
Thus we have dL, = 80-358 
+. 036 
+  -390 
1 20'S = 80-784 
30 23 39-5 7 
ets SD RE 
80 22 18-7 latitude of the peak. 
Tur 2d term not amounting in this extreme case, tol of a second, may 
be always neglected, and consequently the calculation reduces itself to the 
addition of 3 logarithms. 
For the longitude we have, 
Tangent .P —. Tene % 
3 Cos L. 
A a) wy 3% 
Bur tangent P—*F ,375_—R being the number of seconds im 
R : 
the arc = to radius. 
§ n 
Wherefore 2) ane! es 
kK > 
Multiplying by R ; P ise R Tane-on ah a as 
Cos L z R': 
Acatn in like manner tangent } — au f, f being the factor given by 
Table 5, or that by which the arc hee multiplied the product is the 
tangent. Also 3 == = p being the fale of feet in 1 of the perpendicular, 
substituting these values the above equation becomes, 
th gad 
P me p Cos L 3 RR 
