88 Dr. Wolf on the Magnetic Variations at Greenwich. [Jan. 14, 



daily variations of the Declination as given by the Greenwich Observations 

 1841-1857, and as entered in the subjoined Table under v^. 



3d by (IV). 



Diff. 



w O rl ro ti-vo 00 O w t^'^c^vot^vo coc< 

 COM -^O O roHvo O O l>->-i ■^v-it^w 

 "OOOOOOOOO'-'OOOOOOO 



1 1 + 1 1 1 1 +++ 1 1 i ++ 1 1 



0< 



t, 



'I 



3 



h 



^ 





Calculat( 





p ^^c^' y^^^ ? r^? ? 

 b\oo V^t--oooo b b boooooo t^vb vb iovb 







P* hT On to 



V^oo i>. i^NO 



;dby (III). 



Diff. 



o o t}-0 COW o MOO m ^ c^ ■<4-cow 



OOOOHHVOvnMOt^'-'OOtHt^iHMOO C3N 

 ^OOMOOOOOOOMOtHOOi-iM 

 + + + + + + + + 1 + 1 1 I 1 1 I 1 



CO 





Calculat( 





cow wOOVO O t>- On O O\00 M rj- c^ tJ- CO M 



00 p w p^y^r^y^r^r" p r^r p^*® 



^ K K K t-- V-oo On b b On Ovoo 00 i^vb "b 



squares 



NO CO c< On On 

 NO t1- yiNo ON 

 oo b b onoo 



l-l tH 





!>. CO fi oo y^"p 00 r^r^p p^p p r' p^°? ^ 



.-00 booo Koo 00 'o^ w b b t>.oo I>. i-^vb io 



lum of 









c4 O O O 00 O O O >H On m m m O O 



■^MMCll-IClC^MC^CJNH WIHIHC<I-I 



in 





Lination. 



mum. 



Tj- On o w ^ y^oo p y^ r^?' ®o 



CO Ih On CO tJ- Koo 00 Tt- b io ii^OO OO vb w CO 

 M M MXO'^'4-^COMi-it-i tJ- to 









the Dec; 



Mini 



„cococococ5f»c«c*c<e*c5f<c<'-'>-<>-<M 









;an of i 



< 



^«c^c<e<c?c)c<c<c^f^««c»c^t^c<i-i 









Hourly in( 



Maximum, j 



w f^vpooNooo f^oooo y^t^^p J>- tovo 



^ 'm b "r^ b V» i^OO On V}- b CO CO vj-> V-) CO On 

 C^CIWC^ lOlOVO'^t-COdf^l-l IO.^CO 



COCOCOCOCOC5t^M«f^C^C^f5MMMM 



Oc4c^c?c^c^Mc<c<^lMc^«c^HcJc<cl 









Calculated by (II). 



Diff. 



On CO O CO M vj-)00 O '-I w "O 'i-OO to O O 

 "^J-COCOO COONMVO cooo On O CO rj- co m 



^MflWMOOtOOlHOMOOOOMCl 



1 ++++++ 1 1 1 1 + 1 ++ 1 1 



CO 



to 



to 



CO 







On O On to c^ O m w no 00 to Q Q 

 to _ON CO to t^VO OnVO t>-tOONO 0\C» O i-i 



M b b b w Vi- to io CO CO b b b w 







oo NO On O O 



oo NO t-^ to ^ 

 Vi to to tJ- CO 





Diff. 



w vo C^ O O O COVO t^NO Onno 

 to M ON CO p f p NO oo w .'^ r* 



- w cj w b b "I CO b w b M b b b b 

 I ++++++ 1 1 1 ! + 1 ++ 1 1 



o 



to 



CO 

 CO 





Calculal 





M cooo O 00 O t~- O NO d t^NO CO CO Onvo 



NO p oo y^ .'=1' y^ 5^ r^oo p p >^ ^ 



M M b b "cJ ^- ty-) in CO CO C^ M b b w 



squares 



O to (--00 oo 

 «>o <o r}- N 61 

 ^ io io ^ CO 



Mean 

 absolute 

 variat. 



HH COVO NO M NO oo CO CO ONVO O CO CONO O 

 b CO M *IH H CO to ^ Ih CO m Jh b 00 ON 



Sum of 







Ratios 





y^f p p P .'^ V' r^r^ onhno 



ON b\00 CO CO On b to Vi" Ih OnNO rf- Ih 

 c) i-c M CO -rl- O Onno no tr, CO >h ci 



On 2^N0 rj- ^ 



b NO e>o t-- On 

 to On On to 



Year. 



w CO t1- toNO 1^00 On O "H d CO tJ- tovo t~~- 

 •^•^'^•>T'4-'^'!i-'^'4-totovotoiotoioto 

 oooooooooooooooooooooooooooooooooo 



oo 0\ O w d 



to tONO NO NO 



oo 00 oo 00 oo 



I naturally lost no time in proceeding to try whether I could not repre- 



