Kinahan — On Granite and Metamorphic Rocks. 213 



Cromwell's Hill, Co. Limerick. Shaded yellowish-brown ; cuts 

 well, polishes fairly, but shows minute vesiculars. 



Kilteehj Hill, N.W. of Priest's House, Co. Limerick. Yel- 

 lowish-brown ; slightly spotted ; cuts and polishes well. 



The following all cut and polish well; they are of various 

 shades of grey, but none of them give handsome stones : — Kilteely, 

 Castlefarn, Knockdirk, Ballynard, and Coolnapisha ; all in Co. 

 Limerick. The last is porphyritic ; and in places the stone is 

 changing into ophyte. Probably better stone might be procured 

 in the vicinity. 



Some of the conglomeritic tuffs, especially those near Lough 

 Gur, can be easily raised in squarish blocks of large scantlings. 

 These have not been much utilized in modern times ; but some of 

 the prehistoric forts, or cahers, were, in a great measure, built of 

 them ; the wall of the caher, or rath, being composed of mega- 

 lithic blocks, placed on edge or end, and banked on the outer face 

 with earth. The blocks were rudely fitted together; the inter- 

 stices being filled in with smaller pieces. 



[In treating on the Mabbles and Limestones we mentioned the Calcareous 

 tuffs of Limerick, and raised the question as to their durability. For further informa- 

 tion on this subject see Wexford.] 



In places the whinstones and eurytes of the Co. Limerick, 

 appear suitable for paving-setts ; it may therefore be suggested 

 that an export trade from the port might be established ; the stones 

 being sent to England in the return colliers and other ships, instead 

 of the ballast which they now so often carry on their return 

 journeys. Some of the more calcareous tuff, also, seems to be 

 capable of being utilized in the manufacture of hydraulic cements. 

 Before, however, either of these industries were commenced, the 

 likelihood of success and ultimate profit should first be thoroughly 

 investigated. 



CORK AND KERRY. 



In the Dingle promontory, Co. Kerry, the tuffs in the Anascaul 

 beds (Ordovician) and the tuffs, felstones (?), and whinstones in the 

 Ferriter's Cove beds (Silurian) are not put to any special use, 

 except for local farm purposes, as better stones can easily be pro- 

 cured. Some of the tuffs, however, rise in nice flat-bedded stones, 

 suitable for walling. 



