I to flints for the Formation of 



3. Whether thofe found on the borders of any river might 

 be contidered as having been thrown up by that river, or 

 whether it only expofed them to view by waihing away the 

 foil which it watered. 



4. After eftablhhing the character of the pebbles of a cer- 

 tain diftrift, one might follow, as it were, their traces, and 

 form conjectures both respecting their origin and the route 

 they have purfued. 



5. Theincreafe of their fize will (hew that they approach 

 their origin, or viceverfa ; but care muft be taken that other 

 veins of pebbles croffing the former may not conceal the 

 courfe of thofe which you are tracing out. 



6. A confideration of the pebbles, and ft ill more that of 

 rolled blocks, or, at leaft, fuch as are foreign to the foil which 

 bears them ; of the height at which they are found, and 

 of the large valleys oppofite to their prefent fituation, may 

 afford fome indications of the direction, fize and force 

 of the currents produced by the grand revolutions of the 

 earth. 



7. A confideration of thofe blocks which reft on folid 

 rock, and which feem ftill to occupy the place where they 

 were depofitcd, may, by the ftatc of thefe rocks, give an idea 

 of the time elapfed fince their arrival. 



■ 8. How far can the tranfportation of thefe great blocks to 

 confiderable diftances be confidered as a general phenome- 

 non ? or, is it only a particular phenomenon, arifing from 

 fome local caufe ? 



9. Can it be believed that fuch of thofe blocks as at pre- 

 fent occupy elevated fites on mountains, have been tranf- 

 ported by billows or waves, which raifed them gradually 

 from the bottom of the valleys, and that they muft at firft 

 have defcended to thefe elevated fituations * ? 



10. Or was it by enormous tides, of eight hundred toifes 



* May no* the tranfportation of thefe blocks, at leaft in cold countries, 

 ke afcribed fometimes to floating ice? C. 



'. for 



