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pour le matin & le foir; ces deux derniers termes ne différant que très-peu entr'eux, ne font qu'un feul Tableau: j'y joins le milieu entre les extrêmes; & la chaleur moyenne qui réfulte de la fomme des degrés obfervés, divisée par le nombre des obfervations.

TABLEAU

des hauteurs barométriques extrêmes & moyennes de chaque mois;

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La hauteur moyenne du barometre à Berlin étoit en 1769. = 28′′. 0, 1TM. Elle est en 1770 27′′. 10, 95". le milieu donne une hauteur moyenne — 27′′. 11, 525′′.

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TABLEAU

des hauteurs thermométriques extrêmes & moyennes de chaque mois, pour Pannée 1770, à 2 heures après-midi.

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NB. Le 5, jour de la plus grande chûte du baromêtre, fut celui où le Ziegenberg près d'Auffig en Boheme s'ébranla, & changea de place, en se rapprochant de l'Elbe d'un espace de dix toifes. Le mercure qui le 3. à dix heures du foir, marquoit encore 28 pouces 21 lignes, étoit tombé le 5. au matin de 14 lignes, en trente heures de tems.

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8

ΙΟ

6

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S. E. le 10. 20.

S.

le 9.

S.W. le 4. 8. 14 – 16. 22. 23. 27.

W. le 2.5.7. 17. 19. 24. 28 - 31.

N.W. le 1. 3. 18. 21. 25. 26.

Sept jours de vents forts, le 4. 5. 16. 17. 21. 24. 31.

La température de l'air.

4 jours fereins, le 2. 3. 10. 19.

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à moitié couverts,

le 5.7. 17. 18. 27. 28. couverts, 4.6. 8. 9. 11-16. 20-26. 29. 30. 31.

le 1. 4.

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Remarques.

Au rapport des gazettes, il y eut le 18. un violent ouragan à Hambourg, avec neige, pluie, & coups de foudre.

Le

7. un furicux

orage à Dunquerque.

Le 22. une maffe du Mont-Liban, d'un demi-mille en longueur s'écroule.

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4 jours fereins, le 8. 9. 12. 26.

ΙΟ à moitié couverts, le 5. 7. 10. 16. 17. 20. 21. 23. 25. 28. couverts, le 1-4. 6. 11. 13. 14. 15. 18. 19. 22. 24. 27.

14

5 jours de pluie, le 5. 6. 17. 18. 21.

6 de neige, le 7. 11. 18. 21. 24. 27.

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