Full text: Astronomie pratique (2. Partie)

NIVEAU A BULLE 
BAIN DE MERCURE 
IOI 
D’où 
*(1, —l 3 )=P+P 
et comme j3 — /3' = 2t\ on obtient finalement 
B = fc + i, P = k i - î — 1 - 2 — i. 
r 2 2 
D’ailleurs l’égalité 
2 \ 0 2 
donne
	        
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