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The Use of

the same Manner as before we found theLength of the Day in the ieveral Latitudesat a particular Time of the Year.

I. Let the Place proposed be under theEquinoctial, and let the Globe be accord-ingly rectified for oo Degrees of Latitude,which is called a direct Position of the Sphere,Here all the Parallels of Latitude, which inthis Cafe we’ll call the Parallels of Declina-tion, are cut by the Horizon into two equalParts; and consequently those who liveunder the Equinoctial have the Days andNights of the fame Length at all Times ofthe Year-, also in this Part of the Earth,all the Stars rife and set, and their Conti-nuance above the Horizon is equal to theirStay below it, viz. 12 Hours.

If from this Position we gradually movethe Globe according -to the several Altera-tions of Latitudes, which we will suppose tobe Northerly; the Lengths of the DiurnalArches will continually increase, until wecome to a Parallel of Declination, as fardistant from the Equinoctial, as the Place itself i? from the Pole. This Parallel willjust touch the Horizon, and all the Heaven-ly Bodies that are betwixt it and the Polenever descend below the Horizon. In themean time, while we are moving the Globe,the Lengths of the Diurnal Arches of theSouthern Parallels of Declination, continu-ally diminish in the fame Proportion that

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