r 



3 



8 



ILLUSTRATIONS OF THE 



ly compad:, the fait is found to be arranged in 

 round mafles of five or fix feet in diameter, not 

 truly fpherical, but each comprefied by thofe that 



fo as to have the fliape of an irre- 

 ■on. Thefe are formed of con- 

 diftinguilliable from one another 



furround 



gul 



polyhed 



centric 



coats 



by their colour, that is, probably by the greater 

 or lefs quantity of earth which they contain, 

 fo that the roof of the mine, as it exhibits a ho- 

 rizontal fedion 

 lygonal figures, 



of them, is divided 



po 



ires, each with a multitude of poly 

 thin it, having altogether no inconfider 

 able refemblance to a mofaic i^avtment. In the tri 



gon 



angular fpaces without 



polygons, the fait 



Th 



parallel to the fides of the polyg 



ft 



which 



g 



fe to th 



ftru6lure we fiiould in vain endeavour 



a> * 



yet fome general conclufions con- 



fingular 

 to defin 



r 



cerning them feem to be within our reach. It 

 is clear that the whole mafs of fait was fluid at 

 once, and that the forces, whatever they were, 

 which gave folidity to it, and produced the new 



particles, were all in action 

 The uniformity of the coat- 

 ed ftrudure is a proof of this, and, above all, the 



arrangement of it 

 at the fame time. 



s 



compreiTion of 



polyhed 



ys 



flat fide of anoth 



the flat fide of one being turned to the 



IT, and never an angle to an an- 



c 



fide. The coats formed 



were 



Ik. 



