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1re décade, 725,77 726,30 726,61 726,74 726,26

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726,52 726,75 727,08 727,17 721,58 721,66 721,58 721,28 720,70 720,44 720,59 720,85 720,92 720,44 720,61 720,67 720,46 720,06 719,88 720,25 720,81 720,96 Mois.... 722,53 722,78 722,88 722,75 722,27 722,21 722,46 722,85 722,95

1re décade,

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3,11 +0,18 - 2,26

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0,64

2,30 +0,01 + 1,59 + 2,30 + 2,29 + 1,03 + 0,14 +0,75 + 2,40 + 3,24 + 4,06 + 4,12 + 3,442,00 +0,42 - 0,90 0,461,912,95 +5,06 +2,36 +1,28 +0,29

0,82 + 0,94 + 2,245,105,162,28 + 1,15

+ 0,03

Tension de la vapeur.

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0,85 0,82 0,81 0,79
0,76 0,71 0,64 0,68 0,74
0,73
0,69
0,67 0,71 0,74 0,77
0,74 0,71 0,72 0,76 0,81

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Therm. min. Therm. max. Clarté moy. du Ciel. Eau de pluie ou de neige. Limnimètre.

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Dans ce mois, l'air a été calme 4 fois sur 100.

Le rapport des vents du NE à ceux du SO a été celui de 2,84 à 1,00.

La direction de la résultante de tous les vents observés est N. 15o,6 E. et son intensité

est égale à 64 sur 100.

405

TABLEAU

DES

OBSERVATIONS MÉTÉOROLOGIQUES

FAITES AU SAINT-BERNARD

PENDANT LE MOIS DE MARS 1853.

Hauteur de la neige tombée pendant le mois de Mars: 2m,158, répartic

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Dans la soirée du 31 la lumière zodiacale a été très-sensible jusque vers les

10 heures. Elle dépassait les Hyades.

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BAROMETRE reduit à 0".

TEMPÉRATURE EN DEGRÉS CENTIGRADES.

HYGROMETRE.

8 h. s. 8 h m. Midi. 4h d.s.18h.d.s./Minim. Maxim. Sh.m. Midi. 14h.s. 8h.s

millim.

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550,33

551,72

552,08

556,16

557,32

558,71

561,25

561,97

562,25

550,24-14,0-13,8 -15,3 -17,6-18,1 550,82-18,9-17,4 -17,1-17,5-23,2 553,31-15,3 -12,0 -13,5-15,0-18,0 560,19-18.0 -17,5 -17,5-19,0 -19,8 -14,7 562,71-16,3 -11,2-11,4 -10,0 -22,5

9,8

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18,3 NE. 2 1,00

74

62

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15,4 NE. 1 0,31

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8,2 NE. 1 0,77

80

75 68

74

7,4 NE. 3 0,98

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548,45-13,5-10,5-10,5 -14,2 -21,5 546,31 -14,2 -16,0 -18,4-19,0-20.0 548,12-19,4-16,7 -15,6 -18,4 -23,0 -14,9 75 69 64

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70

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NE. 3 0.98

72

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SO. 2 0,43

-13,9

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11,3 NE. 3 0,94

74

553,87-19,8 -15,5-15,5-15,6-22,7 -13,4

78

68

64 65

7,0 NE. 3 0,98 »NE. 2 0,21

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3e

558,32
556,19 556,11
" 552,89 553,08 553,36
Mois... 555,58 555,75

558,65

558,96

556,12

558,98
555,95 555,59

559,15

559,49

559,85

mm

559,92

555,36

555,51

555,44 555,52

553,38 553,47 553,50
554,35 554,44
555,96 556,01 555,93 555,93 556,19 556,48 556,56

Température.

553,80

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Dans ce mois, l'air a été calme 10 fois sur 100.

Le rapport des vents du NE à ceux du SO a été celui de 2,58 à 1,00.

La direction de la résultante de tous les vents observés est N. 45° E. et son
intensité est égale à 71 sur 100.

NB. Les observations des températures maximum ont été interrompues à partir du 27,
par suite d'un accident survenu au thermomètre; elles seront reprises incessamment.

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