of the North of Ireland. 1S3 



it runs to the extent of four hundred and sixty yards in a direction 

 from north-east to south-west, coming up to the top of the hill 

 towards the latter point, and falling down the opposite way. The 

 pillars are five and six sided ; a few have seven sides. I measured 

 two of the largest size ; one of them was three feet, the other two 

 feet eight inches in diameter. 



' Along the slope of the hill, the pillars are so completely dis- 

 engaged from the soil, that I could easily determine their angle with 

 the horizon ; I found it 22 ''. 



On the main at Knocksoghey, the highest ridge of land between 

 Ballycastle-bay and Whlte-Park-bay, some fioetz-trap pillars, most 

 of which are neatly defined, are quarried for building. Another 

 quarry of the same rock has been opened at Ballynastrade near 

 Ballintoy. 



Croaghmore, one of the hummocks that lies at the greatest distance 

 from the coast, is completely formed of an assemblage of pillars 

 almost vertical, and jointed as is usually the case. 



In the town-land of Craigahulliar, one of the most beautiful 

 colonnades that can be seen lies under a mass of tabular basalt. Its 

 extent is only one hundred and ninety feet, in a direction from 

 east-north-east to west-south-west, presenting its fa9ade towards the 

 north-north-west : the pillars are from eighteen to fifteen feet in 

 height, and the individual joints of which they are composed, one 

 foot and a half; most of them are five-sided, others have four and 

 six sides ; they are remarkably sonorous. 



I have remarked some rude attempts of the flcetz trap to assume a 

 prismatic configuration at the bridge of Bushmills, at Magilligan, 

 and on the north-west side of Donald-hill, but not distinct enough 

 to be more particularly noticed. 



It was natural to suppose that basaltic pillars, containing so 



