the side of the great road from Newry to Belfast. Its length, so far as hitherto observed, is half a mile.”
“ The rock, which is covered with mould to the depth of about a foot, consists of a grey granite. The vein is about two feet and a half, or two and a quarter in width; at the places of contact both the granite and pitchstone are disintegrated, the latter being almost as soft as clay, but becoming gradually harder, as it approaches the center of the vein. The structure of the vein is foliated, the folia being perpendicular to the horizon, and also to the walls; and besides these, there are seams, that run longitudinally, parallel to the horizon, and nearly perpendicular to the folia.”
Although this substance presents some peculiarity, in being divisible into rhomboidal fragments, it approaches in this respect to the pitchstone of Arran (in lamellar concretions) which holds as it were a middle place between it, and that possessing the more usual characters.
Mr. Jameson has described a vein of pitchstone “ running in granite,” observed by himself in Arran; and he states that “ lamellar distinct concretions have been hitherto observed in the pitchstone of that island only.”
8. The granular suplhate of barytes, hitherto very rare, has been found, as the Rev. Mr. Hincks of Cork informs me, by Dr. Wood of that city, on the sea shore, near Clonakilty, from whence a specimen in to Museum of Dublin College, (No. 653) has probably been obtained: it is accompanied by iron pyrites.
9. Wavellite. This remarkable mineral has recently been found in the county of Cork, at Springhill near Tracton-abbey, about ten miles south—eastward from the city. The Rev. Mr. Hincks of the
- Min. of Scottish Isles, 4to. vol. I. p. 81.
- Jameson's Mineralogy, vol. I. p. 261.