348 Da Silveira on the Mean Declination of the Magnet, [June 16, 



$ 



o 



m 



i 



Differences 

 from the 

 means of 

 the six 

 years. 



-ji^t^t^ ep-jHQp rHOO rHCpO 0"*0 



<fiPO t^fH-^ 'Tt^oo eaebos rnooiis 

 eOTt*0 eOrHO OTtieo OOTt< •-lOO 



,0 OrH OOO OOO OO© ^ (Zl t-i 



+++ +++ +++ ++ 1 III 



Means cor- 

 rected. 



25 45-2 



25 50-5 



26 11-5 



25 45-4 

 25 19-2 

 25 12-6 



25 11-9 

 25 47-8 

 25 42-8 



25 09-9 

 25 14-1 

 24 18-8 



23 56-5 



24 09-4 

 24 02-3 



Corrected 

 for Secular 

 Change. 



-2 40-7 

 -2 31-5 

 -2 22-3 



-2 13-1 

 -2 04-0 

 -1 54-8 



-1 45-6 

 -1 36-4 

 -1 27-3 



-1 181 

 -1 08-9 

 -0 59-7 



-0 50-5 

 -0 41-4 

 -0 32-2 



Means. 



eiL -(- 



2'8 25-9 

 28 22-0 

 28 33-8 



27 58-5 

 27 23-2 

 27 7-4 



26 57-5 



27 24-2 

 27 10-1 



26 28-0 

 26 23-0 

 25 18-5 



24 47-0 

 24 50-8 

 24 34-5 



eo 1 

 «5 -r 



00 ^ 

 (M 



13 27-0 

 13 55-8 



13 48-0 



14 9-6 

 12 32-4 

 12 10-8 



11 31-2 



11 52-8 

 14 48-0 



12 55-8 

 11 36-6 

 10 45-6 



10 20-4 

 9 40-2 

 9 34-8 



eg 1 



OO o 



20 28-8 

 20 18-6 

 19 17-4 



19 18-0 

 18 22-8 

 18 27-0 



18 55-2 

 18 27-0 

 17 19-8 



17 25-2 



18 9-6 

 16 37-2 



15 46-2 

 15 53-4 

 i 15 39-6 



H- 



«=> o 

 OO ^ 

 r-l eg 



26 42 

 26 52-8 

 29 41-4 



26 53-4 

 26 19-2 

 26 40-8 



25 45-0 

 25 47-4 

 25 10-8 



23 48-6 



24 2-4 

 23 25-8 



22 9-0 

 22 29-4 

 22 120 



d + 



«o o 

 00 r-i 



i-H eg 



30 37-2 

 30 54-6 

 30 15-6 



30 10-8 



31 8-4 

 31 34-8 



31 16-8 



32 45-0 

 31 36-6 



30 52-2 

 30 20-4 

 28 54-0 



28 31-2 

 28 6-6 

 .28 6-0 



+ 



\ei O 



00 rH 



rH eg 



37 12-5 

 ; 36 38-7 

 37 12-4 



36 4-5 

 35 38-7 

 35 40-3 



34 20-2 



35 20 

 34 48-0 



34 9-0 

 34 50-4 



34 57-0 



35 9-6 

 35 28-8 



1 34 25-8 



00 + 



rH eg 



42 08-0 

 41 31-5 

 41 08-3 



41 14-6 

 40 17-5 



38 11-0 



39 56-5 



40 31-2 

 39 17-7 



39 37-2 

 39 18-7 

 37 11-5 



36 45-5 



37 26-2 

 37 28-8 



Decade. 



rHcgeo rH^eo rnegeo rHcgco r-icgeo 



Months. 



January ... 

 February... 



March 



Mflv 





