MAGNETIC OBSERVATIONS. 



187 



Admiralty Standard Compass. 

 Equations of Condition. 



o = o.ooo 



+ 0.058 







O =; — O.699 



= — 0. 109 



O = 9.S69 



= 4- 0.037 



O = -\- O.O06 

 = + I.O57 



— 0.037 



— 0.006 



— 1057 



— 0.699 



— 0. 109 



— 9.S69 



+ iG-294 

 + 0.826 



+ 70.177 



4- 0.25s 

 4- 28.825 



lence 



A l = 



D.OOO 



f-+ 





T = + ° 



O24O 



¥=+ 



Normal Equations. 



+ 49S33 



4- 16.294 



4- 0.826 

 4- 70.177 



4- 0.258 

 4- 28.825 



— = — 0.0016 

 x 



Q 



= 4- 0.006 



A..' 



Absolute Terms. 



A x 





c 





P 



b.p 





/ 



Q 



6.Q 









X 





x 



X 





X 



X 



X 



O = — 0. 15S 



— 0.010 



+ 



2.694 



+ 



0.212 













= — 0. IOO 



4- 0.010 



+ 



1. 176 



+ 



c. 148 



4- 2.520 











O = — 0.064 



0.000 



+ 



0.077 



+ 



0. 161 



+ 9.516 











= — 0.054 



4- 0.002 



— 



0.603 



+ 



0.166 



+ ^i-933 











= — 0.023 



— 0.012 



— 



1.426 



+ 



0.164 



+ 16.522 











o = — 0.023 



— 0.002 



— 



0.710 



+ 



0.158 



+ 24-375 











= — 0.041 



— 0.001 



— 



0.1 13 



+ 



0.143 



4- 25.608 











o = — 0.053 



4- 0.001 



+ 



0.623 



+ 



0.132 



4- 2(1.316 











= — 0.048 



4- 0.002 



+ 



0.S36 



+ 



0.129 



+ 27.440 











= — 0.0S5 



— 0.022 



+ 



1. 910 



+ 



0.177 



+ 41-519 











= 4- 0.010 



-0.158 













4- 



2.694 



4- 0.212 





= — 0.010 



— 0. 100 













+ 



I. I76 



4- 0.148 



4- 2.520 



= 0.000 



— 0.064 













4- 



O.077 



4- 0.161 



4- 9-5' 6 



= — 0.002 



— 0.054 













— 



O.603 



4- 0.166 



4- '3-933 



= 4- 0.012 



— 0.023 













— 



I.426 



4- 0.164 



4- 16.522 



O = 4" 0.002 



— 0.023 













— 



O.7IO 



4- 0158 



+ 24-375 



= 4- 0.001 



— 0.041 













— 



0.1 13 



+ 0.143 



4- 25.608 



= — 0.001 



— 0.053 













4- 



0.0; ; 



4- 0.132 



+ 26.316 



= — 0.002 



— 0.048 













+ 



O.836 



4- 0.129 



4- 27.440 



= 4- O.OJ2 



— 0.085 













T 



1. 910 



4- 0.177 



+ 4'-5'9 



4- 49S33 



= — 0.00023 



After Binnacle Compass. 

 Equations of Condition. 



Absolute Terms. 



A, 



c 



P 



A^ 



/ 



Q 



A<? 







X 



X 



X 



X 



X 



>. 



= — 0.127 



— 0.022 



4- 2.694 



4- 0.212 











= — 0. 100 



— 0.002 



4- 0.077 



4-0.161 



4- 9-5' 6 









= — 0.096 



4- 0.012 



— 0.603 



4- 0.166 



4- '3-933 









= — 0. 100 



— 0.004 



— 1.426 



4- 0.164 



4- 16.522 









= — 0.070 



4- 0.002 



— 0.710 



4-0.158 



4- 24-375 









= — 0.073 



— 0.001 



— 0.1 13 



4-0.143 



4- 25.608 









= — 0.058 



4- 0.006 



4- 0.623 



4-0.132 



4- 26.316 









= — 0.054 



— 0.005 



4- 0.836 



4- 0.129 



4- 27-440 









= — 0.061 



— 0.039 



4- 1. 910 



4-0.177 



4- 4'-5'9 









= 4- 0.022 



— 0.127 









4- 2694 



4- 0.212 





= 4- 0.002 



— 0. 100 









4- 0.077 



4- 0. 161 



4- 9-5'6 



= — 0.012 



— 0. 096 









— 0.603 



4-0.166 



4- '3-933 



= 4- 0.004 



— 0. 100 









— 1.426 



-j- 0. 164 



4- 16.522 



= — 0.002 



— 0.070 









— 0.710 



4-o 158 



4- 24-375 



= 4- 0.001 



— 0.073 









— 0.1 13 



4-°-'43 



4-25608 



= — 0.006 



— 0.058 









4- 0.623 



4- 0. 132 



4- 26.316 



= 4- 0.005 



— 0.054 









4- 0.836 



4-0.129 



4- 27.440 



= 4- 0.039 



— 0.061 







1 



+ «-9'° 



+ 0.177 



4-41-519 



