(8) | 
Variations de la déclinaison magnétique observées à Bruxelles, de 5 
en 5 minutes, et pendant 24 heures, à partir du 23 décembre 1840, 
à 10 heures du soir, temps moyen de Gœttinque. 
10 hs. [53,20/53,33|53,34| 53,50 |53,66[53,50|53,42/53,25/53,34/53,04/52,54/52,15 
an — |52,45/55,42/54,20|54,50154,60[54,79/55,00/55,11155,15/54,88/54,76/54,67 
Minuit . (54,44154,23|53,06| 53,80 [53,66 |53,81153,85|53,57|52,49/51,69|51,24/51,52 
1h.m. [51,78/52,14152,45| 52,59 [52,37 |52,51152,57|52,80|53,22/53,45/58,79|54,06 
2 — |54,82/54,57/54,60|54,76/54,70|54,67|54,36/54,07154,37|53,97|53,70|53,82 
3 — |53,94/54,15154,36| 53,82 153,63 |53,98153,36/53,17|53,16/53,16/53,24/53,74 
a — |53,93154,18/54,49/54,62/54,34154,17/55,83/53,82|53,50/53,34153,18/53,28 
5 — |53,14/53,24153,12| 55,20 [53,20 |53,35|53,25/53,01152,87[52,96)52,98|52,91 
& — |52,98/52,98/52,89| 52,70 [52,55 |52,68|52,62|52,52/52,47/52,82|52,73/52,53 
ï 6 
8 
9 
HEURES. | 0’. | 5’. | 10’.| 15’. | 20’. | 25. | 50’. | 35’. “| 50!. | 55. 
} 
— |52,55152,42/52,56| 53,07 [52,89 |52,80/52,83153,03/52,94152,97/52,85/52,81 
— 52,79! » [53,38 53,32153,03 |53,05152,98/53,02153,05|52,88/52,92/53,57 
— |53,35/53,05/53,42| 53,02 153,02 |53,05153,20/52,96/52,88|52,98/52,95|52,93 
10 — [52,82/52,72 [52,34] 52,07 |52,01152,24/52,51152,63|52,53]52,35/52,33|52,36 
11 — 52,25 52,19 [52,42 52,40 |51,96/51,89/51,60/51,73|52,09|51,91/51,82/51,70 
{omiai. . [51,75 51,61 [51,311 51,08 |51,34|51,59/51,81/51,79/51,74/51,58/51,50/51,55 
1h. s. |51,86/51,76|51,90| 51,70 |51,44/51,18/50,52/50,71|50,34/50,49/50,75/50.85 
2 — |51,18/51,45/51,50/51,64/51,42/51,11/51,03/51,35/51,66/51,63/51,60|51,36 
3 —  151,53|51,65|51,68|51,94|52,16|52,48152,59|52,48152,41,52,44/52,34/52,17 
4 —  152,09152,14152,39| 52,48 152,56152,41152,52/52,61152,68152,73|52,75|52,70 
5 — 152,79152,74152,80| 52,87 152,73 152,61151,53/52,54152,52152,61152,53|52,47 
6 —  152,57152,57 152,70] 52,72 152,87 |53,05153,50/53,69153,57|53,91154,18]54,32 
7 —  154,56154,51154,16|53,77 [53,35 [53,28 153,66154,16,54,40154,10|53,99153,81 
8 — |53,46153,11 52,82] 53,26 [53,98 154,50 154,50154,35154,01/53,75|53,70|53,90 
9 — 154,39154,63|154,48] 54,89 |54,78/54,68)54,40154,19|53,88153,74153,45153,36 
109 - 53,17 » | » » » » » » » » » » 
