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Table 111. De l’Equation du temps pour l'année 1700. accomplie.
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Ceuc Table n'a pas besoin de corredion Sensible pour ce fiecle ni pour le précédent.

Usage de la Table. Pour un temps vrai ou apparent donné, on cherchera en tête les Signes de la moyenne longitude du Soleil, & les degrés dans la premiere colonne , & vis-a-vis on trouvera lęs minutes. & les secondes qu'il faut ajouter ou ócer du cemps proposé Suivant les tiercs de la Tabic, pour le réduire en temps moyen. Mais si l'on veut convertir un temps moyen proposé en vrai. ou apparent , il faudra y cinployes la méme corrcaion de la Table, mais avec des titres contraires.

Table IV. Catalogue des lieux considérables de la Terre, avec la difference du

temps qu'il faut ajoûter ou ôter au temps du Méridien de Paris à l'Observatoire Royal, ce qui est leur difference de longitude, & de la hauteur de Pole ou latitude de ces mêmes lieux.

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Si l'on veut réduire en degres & minutes les temps & les minutes qui font marqués dans cette Table, on se servira de la Table 2, & l'on aura la longitude des lieux par rapport à l'Observatoire. On remarquera que la longitude se compte en allant de l'Occident vers l'Orient : mais si l'on veut avoir la longitude par rapport à l'Ile de Fer qui est la plus Occidencale des Canaries, il faudra ajouter à toutes les longitudes qu'on aura trouvées en degrés, 20 degrés 30 minutes, qui cst la difference des Méridiens entre l'Ile de Fer, & l'Obseryatoire Royal de Paris

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Ajoutez la Parallaxe.

Nous ne trouvons point de Parallaxe bien sensible dans le Soleil, c'est pourquoi on la peut négliger. Néanmoins fi® l'on veut en mettre une horizontale de 6", on en conclura la moyenne distance de la Terre au Soleil de 34377 demi diametres de la Terre.

Mais si l'on suppose cette Parallaxe de io", on trouvera la distance de la Terre au Soleil de 20626 demi diametres de la Terre, ce qui rcvient à 30939000 lieuës communcs.

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