Miftellanea Curiofa. 5 5 



tribute to Petrefa£Hon, and dhpofe the tranfuding 

 Water to (hoot and coagulate into Stone, fo as 

 continually to fortifie, and, if need were, to con- 

 (blidateany breach or flaw in the Concave Surface 

 of the Shell. 



And this perhaps may not without Reafon be 

 fuppos'd to be the final Caufe of the admixture 

 or the Magnetical Matter in the Mafs of the 

 Terreftrial parts of our Globe, yip To make 

 good and maintain the Concave Arch of this 

 Shell : For by what the Excellent Mr. Newton 

 has (hewn in his Principia Phiiofophia, it will fol- 

 low, that according to the general Principle of 

 Gravity , vifible throughout the whole ilni- 

 verfe, all thole Particles that by length of time, 

 or otherwife, (hall moulder away, or become 

 loofe on the Concave Surface of the External 

 Sphere, would fall in, and with great force de- 

 fcend on the Internal, unlefs thofe Particles were 

 of another fort of Matter capable by their ftron- 

 ger tendency to each other, to fufpend the force 

 of Gravity ; but we know no other Subftances 

 capable of fupporting each other by their mutu- 

 al Attraction but the Magnetical, and thefe we 

 fee miraculoufly to perform that Office, even 

 where the Power of Qavity has its full effect:, 

 much more within the Globe where it is weaker. 

 Why then may we not fuppofe thefe faid Arches 

 ro be lin'd throughout with a Magnetical Mat- 

 ter, or rather to be one great Concave Mag- 

 net, whofe two Poles are the Poles we have be- 

 fore obferv'd to be fixt in the Surface of our 

 Globe. 



Another Argument , favouring this Hypo- 

 thefis, is drawn from a Propofition of the fame 

 Mr. Newton, where he determines the force 

 wherewith the Moon moves the Sea in produ- 

 E 4 ciog 



