Le 
( 495 ) 
Variations de la déclinaison magnétique observées à Bruxelles, de 5 en 
5 minutes, et pendant 24 heures, à partir du 21 avril 1841, 
10 heures du soir, temps moyen de Gœttingque. 
Heures. |. 0’. | 5”. | 10’. | 15°. | 20’. | 25’. | 30’. | 35’. | 40’. 
Minuit . |58,22/58,16/58,16/58,28/58,46/58,54158,46/58,41158,40/58,42/58,43[58,51 
1h. m. |58,48/58,54/58,57158,77159,01159,18/59,37[59,59/59,68159,58/59,52|59,58 
— |59,47/59,44/59,29/59,24159,26/59,16/59,04/59,00/58.,95|58,91158,82|58,86 
— |58,91/58,95/58,90/58,62158,42158,27|57,89/57,61157,45/57,36[57,55|57,48 
57,61157,68|57,83|57,86 
58,08/58,05[58,00|57,78 
58,17/58,04[57,91|57,88 
58,03158,16|58,19/58,44 
57,66/57,54|57,44|57,29 
56,83/56,76[56,74156,70 
56,47|56,38[56,38|56,33 
55,82/55,57[55,55/55,51 
54,78/54,68/54,85|54,92 
55,14155,21155,25|55,23 
55,96/56,01|56,05/56,10 
56,44[56,45 
56,80/56,85 
57,60/57,53 
58,22 
59,11 
59,00 
58,69 
— |57,45/57,39/57,52/57,56/57,51157,59/57,70|57,69 
— 58,05/58,14158,21/58,22/58,19/58,22/58,19/58,14 
57,64157,84,58,13]58,26|58,28)58,25/58,23 
— |57,92/57,98/58,01/58,07|58,03/57,98/57,94157,99 
— |58,23158,17/58,08/58,06/57,93/57,78/57,72|57,75 
© Œ@ 1 @ € à ww Nb 
gr 
LI 
[-0] 
LE 
— 157,16157,12157,11157,06,56,98,56,85/56,76156,78 
10 — 156,75156,65156,68,56,66,56,71156,65|56,67|56,62 
11 — !56,24156,25156,28,56,08|56,03/56,01|55,99155,77 
Midi. . 155,40/55,33/55,21,55,14,55,04154,99,54,96]54,93 
1 h.s, [54,93154,92/54,93/54,90/54,93154,92154,93/54,95 
2 — 155,24155,23155,25155,38153,51155,65|55,78,55,86 
— |56,03156,08156,17|156,26/56,34156,41|56,43 56,52|56,62 
56,93|156,99 
» 157,47 
58,26,58,36 
59,02|59,07 
58,96,58,97 
65 
— (|56,62/56,59/56,61/56,61/56,62/56,67|55,70 
3 
4 
5 — (|56,97157,06/57,24/57,46/57,52157,57 57,69 57,70 
6 — 153,58157,63|57,69/57,73157,68/57,72157,90 
7 60,17|60,01|59,75 
8 59,13/59,31/59,26 
9 
58,84158,76,58,73 
— |58,70/59,47160,00|60,09 
— {59,06/59,04[58,99/59,01 
= Lu 58,89/58,86/58,87 
LOEB 86! : L | ; » ; 5 
| 
10 h. s. |57,44157,40/57,51157,51157,55|57,65|57,65|57,88|57,90|57,64|56,96 
11 — |56,95/57,28/57,73/58,08/58,15158,38/58,44/58,29/58,23/58,24158,24158,93 
| 
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