M A G N E TIC OCSE R V A T I O N S. 



1G;3 



d 

 II 



c 



.0 

 . .a 



5 



>-! 

 00 k. 



H ,o 

 § 



>» a 



2 3 



,0 



<u . ■ 

 P4 V. 



c 



■3 + 



^ H 



TD tj 



C .H, 



CO O 

 ,o 









 U 



u O ri 



s.a a 



> 



t3»y 



OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO 



" ri n n tt ro N P4 PI N u-i (S N MMttMHNflM 



+ 1 



•1 ^ 



j? i ^ 



= u ™ 



1 : 1 



~ ; 11 :' 



•- s S 



Deviation of ] Deviation of 



Compass in ! Compass in 



Points. Degrees. 







^ _.,,_,,.■»_ ,,..«>. »x-< «-•«-<<■< * ^ ^ 



a 3 



u 2 



3 5 



7 a 



..<" 

 n,rj 



co 



W W . ^ -„ -«o • 



ww *a ri"? W 'a ^T fe-w &:„•»-«. 



. ««Tz W « * -N« „■ ./ -!,.» -«? x ? ". r . ■ > ? * >-.■ 



x rf w w ^„£ ? ^ y „ 3^^ ^ £ % *»«£ *^ * > ■*»** > ,_- 



g H«>£ 5T W « W .£\*«».S * _ £ y i" ~St;S £ £ i : £ ^ "**" ' ? ; ' ! ' * ' ' 



^^^^|dHH(4»iu)(Duiioiou9aiii)iiii)ii(i^^5< 1? 55 55 5? 



6 • 1 



« C «° 



Sac 



MM 



a "3 "o 



15 x 

 si 



<5 



XwW^ W»* rfrfi- J?wuiX;>^ ^Intl- •■ ^H 



g^z^^i^x^wyir^x:^?'^-'---'-^ 



A deviation of the 

 a deviation to the VV 



From the "1"' n 

 deviations are obtain 





 II 



3 



vd = 



>o ^ 



CO ^ 



ft ^ 



-=? 



N '£ 



X tu 



rt 



*~~* r*i 



O 



> ■ 



B J! 



" 



sg 



c 

 





 U 



-^ ,„• 



tj O rt 



S's 0. 

 t.SE 

 > 



030 



000000000000000000000000000000000 



0-M-*'*»)--+^-<-IMM-MMN«N"^-* T l - "«"-"""'-"0000"-0 



+ 1 



ta 



.s . 



C M S 



.2 3" 



"5 ^ bi> 

 • 2 S v 



£§a 



• 



^ ^ 



Iff 



■o floo 



o.S 



B « 10 



111 



> go, 



v::~; + "t;;t;;;;:; + ™:;° • • •: 



_ « O en 



uS "S 

 J g 1 1 



° 1 v" 



a .0 



x 1 



J" 



5,0 



co 



w'" w »!5 w"*° hw ^ rt " .> r; fe * 



■ ^,5 W . ^*^ (J -y ■ >,■ —^ ■ £■ ^> 



w ^ w j= rt«*t»y z^w j-h<«ii ui r ; >' S * -** w '- c * ui ^ . .".''.> 

 g h»^W W W |zq ^h««3 w w w cri ^'h,^,±'J: ?' ^ ^ *T? ^ ^ " * * 

 2 •& ^ Z Z ^ ui W W W W c/j x ca; x co x x co x •/; x x i ? ? ? 55 5; 55 Z 55 



A deviation of the North Point of the Comp, 

 a deviation to the West by the Mt;ii — . 



From the observations given above, the 

 deviation are obtained: 



A = + 2° 7'. 1 B = + o 

 D = + 1° 23'. 



u K 



z w w" x ■'■ ■ " . .^t, ? - • • • 

 g ^-Z ui ui ui z ^ j?x- w w w - w - £b !•« 5=' 5 •?' * •=' S -. ^: - 5 s S:' » * g 



Z Z Z Z Z /. UJ UI W W W x x x x x x x x x /. x > p ? -- ^ 55 Z S Z ^. < 



