c 411 ) 
to the Figures in which the Circulation is performed. 
Thus in Fig. II. Let A B C D be a Terrclii, and its Poles A 
the South, and B the North ; and by doing as prelcribed, 
it will be found that the Filings will lie in a Right Line 
perpendicular to the Surface of the Ball, when in the 
Line of the Magnetical Axis continued. But for about 
forty five Degrees on either fide, from B to G or /, and 
from A to Hot K, they will form thenifehes into Curves, 
more and more crooked as they are remoter from the 
Poles ; and withall moreandmore oblique to the Surface 
of the Stone : as our Figure truly represents, and as may 
readily be (hewn by the TerrelU and Apparatus for that 
Purpofe in the Repertory of the Royal Society Flence it 
may appear how this exceeding fubtile Matter revolves; 
and particularly how it permeates the Magnet with more 
force and in greater Quantity in the circumpolar Parts, 
entring into it on the one fide, and emerging from it on 
the other, under the fame oblique Angies : whilft in the 
middle Zone about C and D , near the Magnet’s Equator 
(if I may ufe the Word) very few if any of thefe Parti- 
cles do impinge, and thofe very obliquely. 
Now by many and very evident Arguments it appears 
that our Globe of Earth is no other than one great Mag- 
net, or (if i may be allowed to alledge an Invention of my 
own) rather two } the one including the other as the 
Shell includes the Kernel (for fo and not other wife we 
may explain the changes of the Variation of the Magne- 
tical Needle,) but to our prefent Purpofe the Refult is the 
fame. It fuffices that we may fuppofe the fame fort of 
Circulation of fuch an exceeding fine Matter to be perpe- 
tually performed in the Earth, as we obferve in the TereF 
la\ which fubtile Matter freely pervading the Pores of 
the Earth, and entring into it near its Southern Pole, may 
pals out again into the Ether, at the fame Diflance from 
the Northern, and with a like Force pits Direction being 
flill 
