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Variations de la déclinaison magnétique observéès à Bruxelles, de 5 
en 5 minutes, et pendant 24 heures, à partir du 22septembre 1841, 
à 10 heures du soir, temps moyen de Gættinque. 
neures. | 0’. | 5. |10/. | 15. | 20’. | 25’. | 50’. | 35.1 40°. | 45”. | 50°. | 55”. 
| 
1 | 10 h. s re 57,31 57,71| 57,77157,51[57,33|57,27|5 
L | 11 — |57,06/56,89/56,79 56,53156,51156,59|56,48 
«À Minuit. |56,35156,39/56,39 5 5 56,36/56,39/56,43/56,45 
Dub. m. |56,44156,48156,47 56,39[56,40[56,44156,4315 
| 2 — |56,31/56,22/56,33 3 56,42156,47|56,56156,56|5 
| 3 — |56,64/56,71156,81 5 56,75156,78|56,76|56,70 
D 4 — |56,50/56,74/56,81 56,82/56,76|[56,72156,81 
| 5 — |56,95,56,71156,73/56,7 56,83156,87|56,99|56,94 
l 6 — 156,92/56,98/56,96 7 56,97|57,08/56,76|57,06 
| 7 — |57,27157,34[57,33 2157,35[57,39/57,36|57,40|57,30 
8 — |57,52/57,41157,47 : 57,59/57,45|57,27|57,30 
9 — |57,21/57,34[57,31 57,02/56,85|56,85|56,88 
10 — |56,80/56,68/56 2 56,19/56,06155,92|55,93 
11 — |55,82155,73155, 55,21155,11155,13/55,05 
Midi. 54,97154,90[54,75|54,5 ,55154,68/54,61154,63[54,62 
1h.s. |54,76[54,83|54 54,75/54,80/54,79|54,80 
2 — |54,90/54,98154, 55,04/55,08[55,04|55,08 
83 — 1|55,11/55,10[55,2 5,22155,25|55,27|55,32/55,40 
à 4 — |55,60/55,65155 55,89/55,91155,95|55,97 
5 — |56,05,56,09/56 56,09 /56,09/56,06|56,06 
6 — |56,01/55,90/55,92| 56,08 ; 5155,90/55,99/55,97|55,97 
n -- |55,93155,94/55,98|56, 56,10/56,06|56,07|56,15|56,12 
8 — |56,12/56,05/56,06 1156,05/56,06/56,14156,11/56,13 
9 — |56,17,56,15/56,22|5 56,23156,22|156,20/56,24/56,20 
10 — 156,25 » » hd » » 0] » 
