4-o Mifcettanea Curtofa. 



Poles, and their Pofitions well confider'd, other- 

 wile k will not be eafie to determine what the 

 Variations (hall be ; the neareft Pole being aU 

 ways the ftrongeft ; yet not fb, as not to be 

 counterballanc'd fbmetimes by the united forces 

 of two more remote j a notable Inftance where- 

 of is in our eighth Remark , where I took 

 notice, that in failing from St: Helena by the 

 Ifle of Afcenjion, to the Equator, on a N. Vf7, 

 Courfe, the Variation is very little Eafterly, 

 and in that whole Tracl: unalterable ; for which 

 I give this Reafon, That the South American 

 Pole (which is confiderably the neareft in the 

 aforefaid Places) requiring a great Eafterly Va- 

 riation, is counterpoifed by the contrary At- 

 traction of the North- American and the Afian- 

 South*Po!e j each whereof fingly are in thefe 

 Parts, weaker than the American-South-Pole j and 

 upon the North Weft Courfe, the Diftance from 

 this latter is very little varied ; and as you re- 

 cede from ' the Afian-South-Pole, the Ballance is 

 ftill preferv'd by the accefs towards the North- 

 American-Pole. I mention not in this Cafe the 

 European-Nortb-Pole> its Meridian being little re- 

 moved from thofe of thefe places; and of it felf 

 requiring the fame Variations we here find. 

 After the fame manner we might proceed to 

 conclude the Variations in other places under 

 and near the Equator ; but I purpofely leave it 

 for an Exercife to the Thoughts of the ferious 

 Reader, who is defir d to help his Imagination, 

 by having before him a Map or Globe of the 

 Earth : And to mark thereon the Magnetical 

 Poles in the Longitudes and Latitudes \ affign 

 r,hem. (Vide Plate 2.) 



Thus 



