234 Scientific Proceedings, Royal Dublin Society. 



granite was not appreciated as it is now, and as the works did not 

 pay, they were discontinued. Mr. Harte specially mentions that 

 the Dunglow granite improved in colour with time, when used in 

 facings and such-like work in Derry. 



Croagh-na-Shollog . — On the western flanks of this hill, about a 

 mile south of Dunglow, Mr. J. It. Kilroe records a very red 

 granite, capable of being raised in large blocks. 



Glenveagh, west of Kilmacrenan. — Foliated grauite ; grey, 

 durable, not too hard; used throughout in Glenveigh Castle. 

 (J. Cockburn.) 



Carrick, north of Milford. — Eed, quartzose. 



Glenieraragh, south of Glen Lough. — Gneiss ; grey quartzose* 

 compact, even-grained, durable, evenly jointed, and can be raised 

 in naturally square blocks. Was used in the bridges of the new 

 road from Glen to Barnesbeg. 



Barnesbeg, between Kilmacrenan and Creeslough. — Granite ; 

 grey and red ; even-grained, but of different textures ; splits, 

 punches, and dresses well. The stone occurs as loose blocks in the 

 gap, no regular quarry having been opened ; used for dressings in 

 Kilmacrenan church and in various other places. [J. M'Fadden.) 



In different places in the large granite and gneiss area that 

 extends from the Atlantic north-eastward to Glen, there are veins 

 and courses of good stones, suitable for nearly any dressed work, in 

 which quarries might be opened. Quarries, however, are few, as 

 the surface-blocks, or the neighbouring schists, supply stones suf- 

 ficient for local county purposes, while, except from Lefinn, they 

 do not appear to have been exported or used out of the district or 

 its neighbourhood. 



Magherararty, Bloody Foreland. — Granite ; grey, durable, not 

 too hard for a granite ; used in the quoins, sills, window-heads, 

 piers, chimney-caps, &c, of the Curvane Point Coastguard Station. 

 (J. Cockburn.) 



Torries, Arran Island. — Granite ; pinkish-grey ; coarse, but 

 evenly crystalline ; contains hornblende and sphene. 



Lackagh Bridge, between Creeslough and Glen. — Foliated 

 granite or gneiss ; bright-pink, of a rare and beautiful shade, also 

 shaded grey; even-grained. A hand specimen was inspected by 

 Mr. Sibthorpe, who considered it ought to polish well. Used for 

 dressed stone purposes in the Carrickart Roman Catholic church. 



