Mr. Weaver on the 
with a range of 25° north of east and south of west, and dip of 70' 
toward the south-east, including a bed of granite that varies from six 
to ten yards in wddth, beside irregularly formed masses of the same 
compound, imbedded in and incorporated with the mica slate. This 
rock also contains occasionally small beds of splendent quartz, with a 
greasy lustre. The mass passes through the upper part of Tone- 
lagee, between the summit and its northern arm, extending down to 
the hollow on the other side, (in which the first right branch of the 
King’s river takes its rise), as may be seen in the several spots where 
it has been laid bare by the turf cutters. Hence it appears to 
be a prolongation of the body of mica slate at the head of Glen- 
macanass, gradually narrowed in its western progress, and probably 
tapering to an edge, so as to constitute a kind of wedge shaped mass, 
inserted in the body of the granite. I have met with nothing 
similar in any other part of the granite tract. 
§ 28. The mica slate, which occupies the lower part of Glen- 
macanass on the western side, contains a bed of talc slate of un- 
certain thickness, both rocks dipping 25° toward the south east. 
The talc slate is of a greenish grey colour, and interlaced fibrous 
texture, yet disposed in laminae, forming a slate. It is soft, yet 
tenacious, works easily under the chissel, and hardens in the fire, 
and is quarried and wrought for various purposes, chimney-pieces, 
hearth-stones, grave-stones, water-troughs, &c. On the surface of 
the stone, in the direction of the laminae, I observed, in some cases, 
spots of earthy red cobalt ore, a few of which were as large as a 
crown piece, forming a very thin earthy coating of a peach blossom 
colour ; but I could discover no indication of any other metallic 
substance, and research was not wanting for that purpose, as this 
place forms a portion of a tract which I hold, with two other 
gentlemen, under a mining lease from the See of Dublin. 
