MAGNETIC OBSERVATIONS. 



143 



Sandy Point, February 10, 1866. 

 Correction for Object = + °° 7'- Correction for Lubber Line = + 4° 9'- 



'3'° ■ 



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M W N Tj-ifliAtflifl^i-^n »- « O O OO IH »-i M N Tf uii^NNNMA't N ■* 

 1 +++++++++++++ | | II | | 1 | I | | J | | | 



is designated by the si;.;n + 

 s of the coefficients of the 



'.2 



*3 .£ t 



• 



"o ,g 



■111 



.5 g*'3 



1 1 1 °+++++°° II 1 1 1 1 1 1 1 1 1 1 1 1 II 1 1 1 1 1 



S 1 

 w > 



rt ,2 



hrj 0, 



J" 



p o.rj 



55 



w - * 

 w« . z h*h ?^ -co >• ,.ri* 



«W« JPH-H&S5 g x- H h^JTw „; £ £> H»~£<» „j g * - . - - i= £ 



h«Z w w w w ^hoo^-c^ hhw ^v***^ ? ? is - " tlHlX ; ^ ^ ^ ^' -° ""» 

 fc Z* Jz; £ Z Jg Jz; w" W W W w w w w w 03 co co cri w co ^ {£ ^ £ fc 25 fc &!5 fc 



12 + 

 u u ; 11^ 



^ li " 



O = rt 



•1 ■" g + 

 ' > v_ ' 



ft- ?Q 



I* i ■• 



Z - ■- -3 O 



'5 " - 

 c IS 



MX 



<0 



£ W W co co ? . .*T fc . 

 K W> JWrf rfriJ? ^ww^>"^ ^^t ■ ■ -^^'h 



A deviation of the 

 a deviation to the W 



From the observ 



deviations are obtain 



A=- 



+ 

 II 



vd % 



OO 3 



M W 



4 3. 

 N c 

 >>.S 



3 C 

 « 



O v' 



T3 - 

 > °o 



O II 

 ^ | 



O 



,o 



c 

 





 U 



■a" 3 j; 

 a a " 



u rt 

 u -3 c 



S.2 £ 

 > 



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■* "^VO \DMMOO^Oy5iO'tPlHHOOO- , 0««Hro^-Tj-^-^-TfMHMO 

 1 ++++++++++++++ 1 1 1 1 1 1 1 1 II 1 1 II 1 1 1 1 



+ I 



ta 



T 'u CT. 



C Z u 



.2 rt ^ 



•>Iq 



" 



A deviation of the North Point of the Compass to the East is designated b 

 a deviation ti> the West by the sign — . 



From the observations given above, the following values of the coeffi 

 deviation are obtained : 



A = +i° 3'i K = +5° 3°'- 6 C= + o° 41'. 

 U = +'° S7'-S E = — o° 42'. 5 



"o.S 

 e « „; 



a" 



1 °++4-++++++° 1 1 1 1 1 1 1 1 1 1 1 1 II 1 1 1 1 1 1 1 



rt $ 



K I- 



» S 

 -."> O 



g-U 



73 



. -1- «b, • . > > . .,; Z ■ ^ > 



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 M»Z ^ H * " tt HxW . 05 «W rtI -w./ ^ -* ■*" . ^- Z . . . 



^&^m www r-;.^^ w w ±-«*^x ?' ?' ^ * "*rr°. * * * z ■*■? 



Z Z Z Z Z Z Z W W W K co x x w x co co to co co oa i ^ ? £ S Z Z Z Z Z Z 



MX 



la 



<3 



• ^ fez 



£ w w co" in > , .--"C >, • • ■ 



■jww^ ^"Z.xw^ ^w = fefe- ^1h*-2^?.W 

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