O° 
cor 
© 
Himataya Mounrains. 
TABLE 2. 
Requires no explanation, being the same as the preceding. 
TABL K 3. , 
Is the difference ef the meridional and per Peadiealr degrees, multiplied 
by the square of the sine of the Azimuth or (p— m). Sine’ A. These 
numbers are useful in finding readily the valué of the oblique degree, 
sometimes required to reduce arcs in feet to the angle formed by the 
verticals, Hwurron’s expression taken from the 2d vol. Trig. survey is 
for the oblique degree | 
au es a being the Azimuth, and p m 
the perpendicular, and meridional degrees. This being expanded into 
series is equal to | | 
m+ bot + &e. being = (p—m). Sine *a. 
/Now as the ontdetion is al and m p are nearly equal, and extreme 
accuracy not required in the case in question, we may take the above as. 
eye we for ee n, purposes, | : | 
ihe m ny Ci — LD Sine “A 
Tue table gives the correction io — m) Sine A, which is to be added to. 
the degree of latitude, in order to have the oblique degree. 
“re 
oF 
TABLE .4, 
Xs the spherical excess, that is the sum above 180, which the three 
angles of a small spherical triangle amount to. é 
Tar ee neue two sides and adjacent angles. 
GOY Vee: ; 
VOL. XIV. AY 
