252 Scientific Proceedings, Royal Dublin Society. 



aspect. It can be raised in blocks of almost any size. This stone 

 was used in the Albert Memorial, Hyde Park. Stones up to 25 

 tons weight, arid of great length, being supplied. It was also highly 

 commended by Sir J. N. Douglass, Engineer to the Corporation of 

 Trinity House, London, who used it in the reconstruction of Bishop 

 Rock Light House, Scilly Isles, after a careful personal comparison 

 of different granite quarries in Scotland, Cornwall, and Ireland. 

 It was most favourably reported on, as being well adapted for 

 resistence in batteries, after experiments at the Royal Arsenal, 

 Woolwich. 



On account of its extreme hardness it is eminently suitable for 

 paving-setts. This hardness seems to be due to the re-arrangement 

 of the minerals in the original granite by subsequent metamorphic 

 action. 



The Company are prepared to send into the market all requi- 

 sites, polished, rough, &c, necessary for monumental, architect 

 tural, building, and other purposes, columns, slabs, pilasters, 

 steps, sills, kerbs, channels, paving-setts of any required sizes, and 

 granite gravel for concrete blocks for pathways. 



Besides the stones at present being worked there are others 

 that appear worthy of being inquired after. At Rostrevor-quay, 

 Co. Down, there is a dyke of a good green stone. This has been 

 quite recently quarried for monumental purposes, as mentioned in 

 the notice of the quarries of the Bessbrook Polishing Companj'. 

 It had been previously worked for paving-setts and building 

 purposes. 



Fathom Mountain, Co. Armagh. In places in this mass of 

 elvan there is a handsome pinkish-grey porphyry, spotted pink, 

 white, and black. This rock has not been opened up as yet, and 

 its capabilities are unproved. 



Barnavave, South. A very fine-grained greenish-grey speckled 

 elvan ; cuts and polishes well. This stone, if it could be procured 

 in sufficiently large blocks, ought to be useful for ornamental 

 purposes. 



As in this tract there is a great variety of exotic rock (grey> 

 green, red, &c, el vans and whinstones), there ought to be other 

 stones capable of being utilized in the hills (Cos. Armagh and 

 Louth) westward of Grreenore, and those S.W. of Newry. Traill 

 says of the Carlingford felstone-porphyry, that from the great 



