. . ( m } 
kinown World that lies in the midway between Chili and 
l^eW' ZjalandiZwA between Hounds- Jjland and Teru. 
8. That in failing North-weft from St. Helena by^- 
ce7iJion far as the Equator the Variation continues ve- 
ry fmall Eaft , and as it were conftanily the fame fo that 
in this part of the World theCouife, wherein there is no 
Variation, is evidently no Meridians but rather North- 
weft 
9. That the entrance o{ Hudfons firai^hts and the 
Mouth of the River of P/^^^ being nearly under the fame 
'Meridian , at the one place the Needle varies 29 \ degrees 
tothef^v/j at the other 20 1 degrees to ihtEaJi, This 
plainly demonftrates the impoffibility of reconcileing 
thefe Variations by the Theory oi Bond,: which is by two 
Magnetic al roles and an Axis ^inclined to the Axis of the Earth > 
from whence it would follow, t\i2^t under the fame Meridian 
the Variation Jhould be in allphces the fame way. 
Thefe things being premifed may ferve as a fure foun- 
dation to raife thefuperftrufture of a Theory upon. But 
firft it would not be amifs to ftiew hereby the miftakeof 
Gilbert md Des Cartes: The firft whereof fuppofeS : that 
the Earth it f elf being in all its parts Idagnetical j and the Water 
not s wherefoever the Land is ^ thither alfo Jhould the Needle ^ 
turn 9 m to the greater quantity of Magnetic al matter. But 
this in many inftances is not true > but moft remarkably 
upon the Coaft of Brafde : where the Needle is fo far from 
beingatcradedby the Land, that it turns the quite con- 
trary way ^ leaveing the Meridian to lye N B E> which is 
juft along the Coaft. As to the pofition of Des Cartes, that 
the Iron and Loadfiones hid in th Bowels of the Earth and the 
Bottom of the Sea maybe the Caufes that the Needle varies y 
If! we confider for how great a part of the Earths furface 
