200 Scientific Proceedings, Royal Dublin Society. 



prietor, Mr. Frederick Carroll, was cut out of a block of this 

 granite, while the megalilhic structures, commonly called crom- 

 leacs, in this and the Co. Carlow, have in most cases huge granite 

 blocks as cover-stones. The covering-stone of the Kernanstown 

 cromleac measures 16 feet x 13 feet x 5 feet. (g. s. m.) 



" The interesting and beautiful architectural ruins of Castle- 

 dermot form one of the most extensive erections in which granite 

 has been used for Gothic architecture. They are in the later 

 pointed style of Gothic, commonly known as the Decorated style, 

 and contain many well-finished and delicately- wrought mouldings, 

 which show that granite is not unsuited to such work. The stone 

 is generally in good preservation." (Wilkinson.) 



Neictoim, near the mearing of the county and the town of 

 Carlow. Grey, free-working, even-grained. 



Dairy-farm, south-west of Castledermot. Grey, fine-grained, 

 easily wrought, capable of producing fine and elegant work ; can 

 be raised in blocks of considerable size and length. " Some of this 

 granite was considered so good that it was sent to Dublin for 

 columns." (g. s. m.) The columns and other cut-stone work in the 

 portico of the Presbyterian Church, Arran-quay, Dublin, are said 

 to have been wrought out of stone here procured. 



Knockroe, south-east of Castleroe cross-roads. Light-grey, even- 

 grained, black mica. (g. s. m.) 



Malta/wise, south of Bushfield. Similar rock to last. (g. s. m.) 



Whinstones, Eurytes, Felstones, &c. 



Towards the N.TV. of the Co. Kildare, at the Hill of Allen and 

 the Chair of Kildare, in the Ordoricians, there are interbedded tuffs 

 and eurytes : the latter, according to Jukes, being somewhat similar 

 to the Lambay porphyry. Towards the N.E. of Kildare, coming 

 in from the Co. Dublin, and forming a narrow strip along the N. TV. 

 mearing of TVicklow, there are also Ordovicians ; those nearest the 

 granite being metamorphosed; while associated with them are 

 whinstones, eurytes, and felstones, similar to those in Co. Dublin, 

 but perhaps not as numerous. 



The intrusive rocks appear to be very little utilized ; but the 

 slates, schists, &c, are generally used for all common building 



