MAGNETIC OBSERVATIONS. 



145 



X 

 u 

 o 

 S5 



o 



S5 

 O 







O 



o 



OS 



M 



H 



z 



o 



O 



U 



W 

 Pi 



H 

 H 

 IK 



a 

 H 



b 

 O 

 tn 

 fc 

 O 



w 



H 



-|- 



be 



capulco, June i, 1866. 



-f- o 6'. Correction for L 



Obj 



Corr 



Correcte 

 Deviation 

 Compass 



1 ++++++++++ MI 



g oo 2 oooo oo^o o 



oOOOO-fO-^-'<tTt^t'<t^^'<j- 



I Ml! 1 1 1 1 1 1 || I | 



o 

 in 



Deviati 

 Compa 

 Degre 



eviation of 

 ompass in 

 Points. 



De 

 Co 



gn 

 Shi 



ed 

 ion 



on o 

 Hea 



Ass 

 Dir 



HH 



1 M 1 1 



! 1 1 1 1 1 1 I! 1 1 1 1 1 







c/2.0 

 c/ic/5c/ic/3t/ic/5c/5c/5c/5c/}V3c/5 



ignated by the sign -f- 

 the coefficients of th 



al 

 C 



lo 



'. 

 E 



Compass to the East 

 the f 



deviation of the North Point o 

 viation to the West by the sign 

 rom the observations given a 

 iation are obtained : 

 A = 1 



o' 



D 



Q 

 I 



tn 

 O 



W 



S 

 O 



Obj 



Co 



Corrected 

 Deviation o 

 Compass. 



Deviation of 

 Compass in 

 Points. 



Kg- 

 I 

 O.U 



ed Magneti 

 ion of Ship' 

 Head. 



11 



S H 



43(3 



19 September, 1872. 



^JOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO 

 ---- ^ r OfO' v )"^"^"~iu^O)^-"H^^-Nu->ro 



OOO^*- "-^ Tj-vO VO ^O Tf- f} HH o 



OOOOOOOOOOOO 

 Tj-Tr-<i--<tN cof^) 



i-iMfOf^r^iofOMN^OOf^ 



i ++++++++++ 1 1 1 1 1 1 1 II 1 1 1 1 



niooli-te Ha -ittHo:H^"l'nte 1 to^>)HOJ^^?i!xnloj^xH^M^-4Htvhctti^Ho^Haci*^to-*w* 



O O O O 



11 



-^. - . ^J"* 1 ** 



' 



^^-w w w tf iw ^- 





is designated by th 

 s of the coefficie 



East 

 valu 



o 



o th 



fol 

 3 



A deviation of the North Point of the Co 

 a deviation to the West by the sign . 

 From the observations given above, th 

 deviation are obtained : 

 A = o so'.o B = - 



