5 8 MifcelUma Cmiofa. 



Laftly, To explain yet farther what I mean, 

 I have adventur'd to adjoin the following Scheme* 

 (Tab. i. Fig. %) wherein the Earth is reprefented 

 by the outward Circle, and the three inward 

 Circles are made nearly proportionable to the 

 Magnitudes of the Planets Venus, Mars and Mer- 

 cury, all which may be included within the Globe 

 of Earth, and all the Arches more than fufhxient- 

 ly ftrong to bear their weight. The Concave 

 of each Arch, which is (haded differently from 

 the reft, I fuppole to be made up of Magnetical 

 Matter ; and the whole to turn about the fame 

 common Axis p, p 9 only with this difference, 

 that the Outer Sphere (till moves fomewhat 

 fafter than* the Inner. Thus the Diameter of 

 the Earth being about eight thoufand Englijh 

 Miles, 1 allow five hundred Miles for the thick- 

 nefsofits Shell, and another (pace of five hun- 

 dred Miles for a Medium between, capable of 

 an immenfe Atmofphere for the ufe of the Globe 

 of Venus : Venus again I give a Shell of the 

 fame thicknefs, and leave as great a fpace be- 

 tween her Concave and Mars \ (b likewife from 

 Mars to Mercury, which latter Ball we will fup- 

 poie (olid, and about two thoufand Miles Dia- 

 meter. Thus I have fhew'd a poffibility of a 

 much more ample Creation, than has hitherto 

 been imagined ; and if this feem ftrange to 

 thofe that are unacquainted with the Magneti- 

 cal Syftem, it is hop'd that all fuch will endea- 

 vour, firft, to inform themfekes of the Mat- 

 ter of Fadl:, and then try if they can find out 

 a more fimple Hypothecs, at leaft a lefs ab- 

 furd, even in their own Opinions. And where- 

 as I have adventur'd to make thefe Subterrane- 

 ous Orbs capable of being Inhabited, 'twas done 

 defignedly for the fake of thofe who will be apt 



to 



