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Variations de la déclinaison magnétique observées à Bruxelles, de 5 en 
5 minutes, et pendant 24 heures, à partir du 20 janvier 1841, 
à 10 heures du soir, temps moyen de Gættinque. 
HEURES. | 0’. | 5’. | 10’. | 15. | 20’. | 25’. | 50’. | 55. | 40’. | 45’. | 50’. | 55’. 
10 h. s. 54,96/54,91 54,79/54,61/54,61, 
La 2 54,66/54,63 54,78/54,70|54,75 
Minuit . 54,22|54,39 54,55/54,56/54,41 
1h, m. 54,09) 54,04 54,10/54,21 154,35 
pv jee 54,70|54,63/54,60|54,49/54,31/54, | 
Que 54,27/54,19/53,98/54,10/53,94/54,03 
ES 54,22/54,27/54,92|54,22/54,03|54,17 
CARE 1153,90/54,11 54,08/54,03|53,96 
6.2 54,09/54,17 54,00/53,99| 54,30 
7 — (54,20/54,30/54,17/54,30/54,32|54,35/54,34154,31 54,33/54,38/54,33 | | 
8 — 54,31/54,35|54,3754,31/54,30/54,40/54,33/54,33 54,33/54,42/54,50)] M} 
9 — |54,45/54,48/54,39/54,40/5:,40/54,43/54,30/54,50 54,21/54,1054,16| 
10 — |53,99/54,05/54,13 be 54,00)53,90|53,90 |: 53,84/53,82/53,79 4 
11 — |53,82/53,79/53,81153,76/53,70/53,66|53,69|53,66 53,51[53,46|53,47 
Midi. . |53,44153,40|53,39,53,35/53,29/53,22,58,24/53,20 5153,06/52,98/53,09 | 
1h. s. |53,07|53,06/52,96/52,94/52,92/52,9652,85/52,85 52,97/53,05|53,02 
2 — |53,12/53,18/53,06/53,11153,01/52,91/52,76,52,70 52 81152,83/52,90 4 
3 — |52,95/52,97/53,12/53,17/53,23|53,27|53,39/53,42 53,46/53,43/53,55 
4 — |53,62/53,57|53,56/53,49,53,57/53,54/53,59/53,53 53,62,53,55|53,54 
5 =. |53,49/53,40/53,27,53,22| » FUATR 13/53,15153,11/53,08/53,13/53,05/} 
6 — |53,23153,37|53,32/53,38153,44 sa s6l se, 74|53,80 53,61/53,26/52,99 
Ù 7 — 152,62/52,14/51,45/51,90/52,35/52,12 52,07/51,80 52,09 52,36,52,36 
8 — |52,51/52,60[52,67|52,91/53,00/55,31/53,39/53,57|54,40/57,01,58,93/59,80 NB 
9 — |58,98/57,30/55,89/55,25/54,77154,45 54,66/54,30 abs 54,86,54,95 [MID 
1000, 155,02|0 » » » rent D »" l'on IE L' 
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