DEGREE 
Sin. dQ © =7.90828 Sin, . 2 7.87337 
Tang. 2% » =7.90830 Tang § 5% = 7.87338 
Sin.’ L = =9.477630 - sing L ° = 9.77714 
Tang? lL =o. le : Tang? TL 2 350.17358 
: ere 5-69747 
Log.2 © =0.30103 Loz. 2 = 0.30103 
4.07704 4.34321 
TIN, = m= 5.849 = 0.74647 Ill, ow ~ 2.20 = 0.34371 
Log. 44246 =4.6458740 I, . 221417 
B- 4424 4.045 i+ Il. a. oon 
ae 9376220 III, ° = 2.2 
Co. Log.6 + 9.2218487 Sn = 
Co. Log. R? = 5.35946247 24992.8 
IV. - - 0,033 = 8.518934 fi 
a To find the difference of longitude = ¢ ~— é. 
I. = 47538.3 @ = = 3.4888814 
II. -. — 3207-2 Sin. Z - =9.99891908 
III. - + 5.6 Co-cof. L’ = 0.1975851 
IV. > + O- —_——_- 
—— 4847.7 = re os 
aieeae = 1% 20° 47". 
To fiod a azimuth of Blackdown as feen from Dune 
If @ be calculated by the normal, as deduced from ne nole. Z’= Z—$O fin. Z tang. ae £9 fin. ¢ fin. 2 Z, 
meafurement, the term II. will be found = == 3287.3, and th -" = 4888 8814 
total fum = 44256.5, * Sin. Z . = a oboe 
Tang. L’ for 0857319 
Example VII. 
Given the latitude of Blackdown, a" : 14”. 31457 © = 3:5 3-575 5 5337 t 
Z=85 57 37-25 : 
Blackdown 7" = 9.39794 
Diftance between and }x= 314307.5 7 = - = 9.97770 
Dunnofe ae = 4.68567 
and the log. of the normal 7.3228977, as deduced from the SinzZe - = 9.14784 
meafured perpendicular degree 61182 fathoms ; ° 
+ 1.61 - = 0.20908 
Required the diftance between the parallels? ; ee 
HC ~  o etre Total difference = 3744".1 = - 2°24". 
Co log. + - = 2.6771022 _ which taken from - 35°57 37-2 
O= 3082.4= = 3.4888814 84 55 13-1 
3o= 1542-2 ——_——» . a 
25" 41".2. Example VIM. 
K .«. . = F.4979%43 Given lat. A, Dunnofe, sor 37’ 8 
Cof. % - = 8.8478695 : 
{2 eee : ; AB=K -  314307.5, a3 in the 
ia 99999879 Jaft example: Required the diftance between the parallels ? 
I - - 22141.7 == 4.3452115 K = 5.4973541 
paniesaiecants Cof.Z = 8.9476719 
z = 9%. 
iin 7 = 7.8733848 Cof. £9 99999879 
; = 9.9989 198 = 4. 
Tang - = 1.1510505 aan 44459139 
Tang. L. + =0.0867896 
m Fa io =7. el 
\ Q.1101447 = 9.9992071 
4- 4-3452115 Tang Z = 1.0506653 
Tang. L = 0.0857319 
Ti. = ° 28 3 23 469 ee 
ea 3-4553508 9.0080691 
Brought 
