352 Scientific Proceedings, Royal Dublin Society. 



pottery, made from the clay of the country ; but about 1719 he 

 established a delph manufactory, when, it is supposed, he imported 

 materials from England. The delph was such a success that china 

 was attempted. This, at first, was so successful that five kilns 

 were built and loaded, but in the baking they proved a total 

 failure, and the ruin of the adventure. Some of the ware made at 

 Killiane was in use in that neighbourhood as late as 1876. 

 {Griffith's Chronicles of the Co. Wexford.) 



Granite, Elvan, &c. 

 CO. ANTRIM. 



Tardree Volcanic Hocks. — It is the opinion of M'Henry that 

 the trachytic rocks at Templepatrick and Tardree were laccoliths 

 which originally did not appear at the surface ; their present expo- 

 sure being due to denudation. They were intruded after the 

 greater part of the basalt; but that there were intrudes of the 

 latter after the genesis of the laccolith is proved by the basaltic 

 dykes that traverse them. 



The tuffose rocks of Tardree, in appearance somewhat like the 

 Brohlthal of Germany, were tried by Mr. Ritchie of Belfast, who 

 failed to make a hydraulic cement from them. 



At Templepatrick M'Henry has discovered a portion of the 

 basal Eocene conglomerate which has been baked by the trachyte, 

 and the contained flints changed into agates. 



DUBLIN. 



There is a handsome porphyritic granite in the Three Rock 

 Mountain, containing very large salmon-coloured crystals of felspar 

 (Microcline). This stone, when polished, is very effective, and 

 would be suitable for inside work, but for outside work the mica 

 (muscovite ?) would be prejudicial, as it would weather out. Two 

 polished slabs of this rock are exhibited in the mineral collection 

 in the Museum of the College of Science, Stephen's-green, Dublin. 



Granite for footpaths and crossings ought to be very carefully 

 selected. This is not the case in Dublin, where some of the stones 

 at present in use are quite unsound, and will in a short time rot 

 and wear away ; while others have unsound corners, which rapidly 



