the Westerly, which is govern'd by the European North Pole, and which I said was greatest some where in Russia .
Towards the Southern Pole the effect is much the same, only that here the South Point of the Needle is attracted. Hence it will follow, that the Variation on the Coast of Brazile, at the River of Plate, and so on to the Straights of Magellan, should be Easterly (as in our third Remark); if we suppose a Magnetical Pole situate about twenty Degrees more Westerly than the Straights of Magellan. And this Easterly Variation doth extend Eastward over the greatest
part of the Ethiopick Sea, till it be counterpoised by the Vertue of the other Southern Pole; as it is about mid-way between the Cape of Good-Hope, and the Isles of Tristan d' Acuntia. From thence Eastwards, the Asian South Pole (as I must take the liberty to call it) becoming prevalent, and the South point of the Needle being attracted thereby, there arises a West Variation, very great in quantity and extent, because of the great distance of this Magnetical Pole of the World. Hence it is, that in all the Indian Sea as far as Hollandia Nova, and farther, there is constantly West Variation; at that under the Equator it self it arises to no less than eighteen Degrees, where 'tis most. About the Meridian of the Island Celebes, being likewise that of this Pole, this Westerly Variation ceases, and an Easterly begins; which reaches, according to my Hypothesis, to the middle of the South-Sea, between Zelandia Nova, and Chili, leaving room for a small West Variation govern'd by the American South Pole, which I shew'd to be in the Pacifick Sea, in the sixth and seventh Remark.
What I have now said, does plainly shew the sufficiency of this Hypothesis for solving the Variations that are at this time observ'd in the temperate and frigid Zones, where the Direction of the Needle chiefly