Kinahan — On Irish Arenaceous Bocks. 619 



NOTES ADDED IN THE PBESS. 



CO. DONEGAL. 



Dunmore Head; and Croagh — Innishowen — one and a-half miles 

 south-west of Dunmore Quay, and two and a-half miles south- 

 west of Culduff. Bluish-grey quartzose flags can be raised in 

 squares from 6 to 10 feet, and of all thicknesses, some thin 

 enough to be used as roofing-slates. — [A. M Henry). 



Kindrum — Fanad- within -the -Waters — west of Kindrum 

 Lough. — Veins of thin, micaceous silicious flags can be raised 

 in large sizes, capable of long bearings; mottled whitish-yellow, 

 or pinkish colour. This stone appears capable of being sawn, 

 and ought to be effective if used in fancy tiling. 



Shanaghan — Ardara — near Shanaghan Lough, and other places 

 in Loughros Promontory. — Yein of micaceous-silicious flags, from 

 two inches or more to the thickness of roofing-slates, for which 

 purpose they have been used ; can be raised of considerable sizes, 

 capable of long bearings. 



Slieveleagae — Carrick. Silicious flags. 



CO. DUBLIN. 



Ring send glass. — For black, Irishtown sand ; for clear, Antwerp 

 sand; about 9s. per ton; or "Grranuloid" (Portsmouth). The 

 latter is a finely-granular quartz rock ; it is supplied in blocks, 

 costing about £1 per ton. 



The following are the ingredients used in the manufacture of 

 black and clear glass, respectively: — 



Black Glass. Clear Glass. 



Irishtown sand. Antwerp sand. 



Waste lime (after manufacture of Whiting (Glenarm). 



mineral waters). Soda ash. 



Blue clay. Bed lead. 



Broken tiles. Manganese. 



Kelp waste (substitute for soda 



ash). 

 Bocksalt. 

 Fluorspar. 



