MAGNETIC OBSERVATIONS. 



161 



°0 



II 



c 



3 

 1-1 



CO c 

 .2 



>-. o 



ID U 



a . 



°~ 

 g + 



2 II 



o 



,0 



c 

 o 



o 

 U 



•a "o . 



u o $ 



o > o 



oooooooooo 



to t t n N - «w* 

 rl + * * '1 m fl - ~ 



ass to the East is designated by the sign -|- ; 

 ollowing values of the coefficients of the 

 o'.l C = +:° 4 '. 7 



o .S . 



c i/> S 



2 r w 



■>Iq 





"s.a 



C « ; 



'■3 S- s 



Jj o " 



Hoc-It-h— <lvHx-*» Hot) 

 O o 



++++++ 1 



j/i o 



la 

 tn 



fc h 



z H r a? •*■ 



-h-2 ^; • -*n pq 

 ,.; W ^='-i-fH»W 2 . co - ja* 

 Hoo2 W W W 2 iT co .a H 

 fcfcfcfcfc'wWWWw 



A deviation of the North Point of the Comp 

 a deviation to the West by the sign — . 



From the observations given above, the 

 deviation are obtained: 



A = + 2° 3'.6 B = + o° 

 D = + 1° 2t'.4 



'■§ ."2* 



MX 



<3 



Kw'W^ ^g .^h^ ^Hw£» - ^ Jfi^rf^»« .--^p 



6 



. II 



in u 



o .a 



CO ^ 



"- 1 >J 

 1) " 



■° k 



S -a 



<u a 

 > o 

 o '-8 



-a <-> 

 c 



_rt ^. 



1— c 



B o 



•1 1 



CO J| 



a? 



M .2 



o 

 O 



u "3 g- 



o '> o 



- 



+ 1 



& *o 



c ^ S 



O ^J u 



■; Si 



Sop 

 P<-> 



- 



"S 8' 



C u 



to ^ 



"! ^ ii 



Deviation of 



Compass in 



Points. 





w 1 



o I II 



| 1 W 



"C in 



55 



CO 



W 



North Point of the Comp 

 sst by the sign — . 

 tions given above, the fc 

 d: 



B = 

 I> = 



'5 ."&• 



"2 §£ 

 £'5 



3 0J 



fc" W W CO "> ^ . .^t. tL . • 



O < . ■ O > > > > > .-," •»' ^ •»' >> 51- 



2^^2lz;<?WWWWWcocococococ«cocococo-y;? ; ^-K-<'r-^;^.<i<'^' £ < 



A deviation of the 



a deviation to the W 

 From the observa 

 deviation arc obtaine 

 A = 



21 October, 1872. 



