computing Magnetic Declination. 



(4.) Lat. and long, of S. magnetic pole. 



S. lat. 7.5° 5' : comp. U° 55'. 

 E. long. 155° +5° 43'= 160° 43'. 



(5.) 1 60° 43' - 90° = 70° 4S'. 



sine 14° 55' ... . 941063 

 sine 70^ 43' ... . 997492 



sine 14° 4' . . . 



517 



(6.) 

 (7.) 



(8.) 

 (9.) 



(10.) 



(11.) 



. . . 938555 



74° 5'+ 1° 37' = 75° 42'. 



75° 42' X 20" = 25' 14" 

 20° O'x I' =20' 0" 



45' 1 4" 

 180°- 1° 37'4-14°4'=192°27'. 

 32400 : 37037 : : 45' 14" : 51' 39". 

 51' 39"x 75° 42'^ 10 = 6° 30'. 

 20° +6° 30' = 26° 30'. 



70°2: 110°:: 15° 55'^ : 5° 40'. 

 90° : 5° 40' : : 6° 30' : 24'. 

 85° 17' + 24' = 85° 41'. 



sine 74° 5' . 

 sine 85° 41' . 



998302 

 999877 



sine 73° 31' . . . 



sine of comp. and rad. 85° 41' . . 

 taug. to comp. . . . 74° 5' . . 



tang 14° 47' . . 



14° 47' + 26° 30' = 41° 17'. 

 sine to comp. 73° 31' . . . . 

 sine to comp. 41° 17' . . . . 



sine to comp. 77° 41' . . . . 



(12.) sine 26° 30' . . . 



sine 85° 41' . . . 



998179 



. . 1887661 

 . . 945511 



942150 



945292 

 987590 



932882 



sine 77° 41' . 



sine 27° 6' . 



which is the northern angle. 



964953 

 999877 



1964830 

 998989 



965841 



