487 



I muft, however, ftate the faB that on the fide of Portrufli which 

 Mr. Ptayfair mentions, pure bafalt is more abundant than the filicious ; 

 and whether mixed with it or not, is always difpofed in regular ftrata 

 of uniform thicknefs, from 12 to 20 inches; and the weft fide of 

 the fame peninfula at 400 yards diftance, is one mighty ftratum of 

 rude pillars from feventy to eighty feet long. 



I fear I may have detained the reader too long upon this little 

 interefting peninfula, where I have fpent the pleafanteft part of my 

 life. I fhould be happy to have an opportunity of fhewing to Mr. 

 Playfair its curious fafts ; and how Nature, who every where around 

 us executes her works en grand, here affumes a diminutive ftile ; 

 and to make him amends for the arguments I have drawn firom 

 this fpot to combat his theory with, I would Ihew him that it bears 

 equally againft other opinions ; and that if he has miftaken our fadts, 

 other writers have overlooked them. 



Mr. Whitehead and Mr. Mills have each of them publiflied accounts 

 of our coaft ; each of them was at Portrufli, yet nothing there feems 

 to have excited their attention ; even Dr. Hamilton who fpent many 

 fummers on the peninfula, and dates his letters from it, let all our 

 curious fafts efcape him. 



FINIS. 



