246 
Proceedings of the Royal Irish Academy. 
Hill facing Ballycorus Works. 
, „ , Direction relative t^- 
No. Locality and Remarks. to true North. 
735 Quarry on ; face of jointing in quarry, . 42 33 W. 
736 Do.; cut by vertical jointing, . . . 59 27 E. 
737 Do. ; extended vertical jointing on S. side of 
quarry, 40 33 W. 
738 Do. ; joint further S. showing an eurite band, 39 3 W. 
739 Do ; well-marked lode, with quartz and 
barytes gangue, on N.E. side of quarry, . 21 33 "W. , 
740 Do. ; vertical jointing, seemingly a lode, to 
N.E. of last, and about 12 feet from it, . 54 3 W. 
By-road to Eathmichael Church. 
741 Near old Round Tower; mica-schist out-crop 
45 27 E. 
742 In field beside the church ; bed cropping out 
in, 45 57 E. S.E. at 48. 
Knock Lyon Road. 
743 Slates on road leading up to Mountpelier, . 84 3 W. Vertical. 
744 Nodular quartz bands in slate-rock, . . 45 57 E. 
Mountpelier Hill. 
745 Eoad to house in quarry on left-hand side ; 
Greenstone dyke, 51 57 E. Vertical. 
746 In quarry ; dyke with gangue of feldspar and 
quartz, 43 33 W. 
747 Do. ; crossed by dykes, broken and shattered, 
and much weathered at surface, . . 72 57 E. 
748 Vertical joints in greenstone to the E. of 
house, from which road-metal taken, . 16 33 W . 
749 S.E. of old house, in stream ; outcrop of slate - 
rock with quartz nodules, . . . 48 27 E. 
Boher-na-Breena Eoad. 
750 Dyke, forming part of wall on road side, 
N^/S"^, 21 33 W. 
Old Quarry S. of Clonskeagh Bridge. 
751 Dodder Eiver; jointing on S.W. side of, 
showing a well-marked face, . . . 88 33 W. 
